Intimate Training

Cody grimaced but kept a professional blank face as he watched Jack's squat. "Lower. Lower. Lower!" he said again to the small flat-chested shark as she did one of the worst sets he had ever seen. This was the pair's second workout together, and already he was starting to wonder WHY the shark had hired him. Cody worked in a private gym that was home to among other things a slew of serious powerlifters, bodybuilders, and more than a few hardbodies who were Instagram-famous. Cody himself was about a year out from competing in the Mr. Universe human class in the heavyweight division and normally trained people who were trying to improve for their next bodybuilding competition and once or twice had an actor trying to get a part or tone up for a role in a film. He was NOT who you hired when you were getting into lifting, but Jack had paid a way higher than normal fee. So he watched her struggle under the bar.

"Jack you need to keep your back straight and dip lower to activate your quads," he repeated to the distracted-looking shark for what had to be the fourth or fifth time. "You can't work those muscles unless you push them, and they won't grow unless you wear them out," he said to the shark who didn't even seem to be sweating.   

"I think I'm doing well! I just started!" Jack grumbled slightly as she tried to sink lower, unable to resist the urge to take one hand off the bar and adjust her glasses, the long and thin lenses flashing briefly red as she dipped... almost losing her balance but quickly grabbing it once again as she lowered.

Her feet were practically sliding all over the place, the thick clawed paws poking the gym floor. Anthros didn't usually have to wear shoes, but Jack was by all appearances the kind of soft nerd even a human could beat up.

"I'm doing more this time than last time, aren't I? A good rate of improvement is, like, another plate or two every session?"

Cody couldn't hold in the briefest snort as he eyed the bar. Jack was squatting with a 45-pound plate on either side of the bar. It was more than the first session but when people who worked out said "plates" they meant 45s. "You are doing better and I think you might be able to jump 5, maybe 10 pounds each time if you really work between sessions, but that's mostly beginner strength gains which come fast at first then taper off," Cody said quickly. "After a few months, progress will be much slower." Cody doubted that Jack was going to have any progress lifting like she was as he pulled the bar back onto the hooks and then began to take the weights off the bar.

 "Oh... hmmm... that's no good. How do you avoid it slowing down? Or is it just, like, it goes fast until your natural 'in shape' level of strength and then slows? I need to increase at a pretty steady rate." Jack pulled out a tablet, actually leaning back against the just finished bar, checking some app that gave a long, rapid readout of proper nouns and numbers.

"Should I just work out three hours a day between sessions? I want your worst, no question," her voice was confident... but she didn't even really look up as she said it

Cody gave Jack an incredulous look. "Well, once you build up your muscular stamina you can work out for maybe 2 hours at a very high intensity on one major muscle group a day, but your body needs time to rest and recover. It's the recovery that adds strength and size. You just can't work out anymore past a certain point." Cody left out that there were a lot of legal and nonlegal substances that helped strength and recovery, but Jack wasn’t anywhere near ready for those yet.  

"If you are trying to put on weight you need to eat a lot of calories to keep your body fueled up with a lot of protein. If you are trying to maintain and tone up just eat the same amount you burn, then you need to get enough sleep and drink enough water to keep your body in a state where it can lift and then heal like it should. There is a lot that goes into it," he said, crossing his arms.

"Well that's what I'm here for! But I think I get it now, one group a day, eat plenty, spend some time and focus on stamina," Jack nodded stoically as her alarm went off, signaling the session coming to an end as she'd managed to dick about for the entire paid time a second time.

She walked up to her trainer, giving his massive shoulder a squeeze and a week, "Thanks hon! Catch you again next week? Or another two? Check's sent, obviously."

Cody nodded knowing that Jack was good for the money. She seemed to work for one of the area’s massive pharmaceutical companies though which one Cody wasn't sure. "How about we shoot for next Thursday, that gives you about a week and a half to get into the habit of that workout routine I designed for you. Don't forget the diet and cardio rest days!" Cody said  though it didn't seem that Jack was paying attention. Again. Still, she was a high-paying client.

"You got it!" Jack said as she took off, barely looking back and clearly not sweating. It seemed a lot like getting paid to do nothing...

Until the next Thursday.

When Jack showed back up, she had a backpack that clanked like it was full of glass, her head just as buried in her tablet as before...

And the muscle of somebody who had been doing this for two MONTHS, not two weeks. Thin, faded lines of tone ran up her arms and legs, and her significantly less-flat chest was causing a tank top made for somebody smaller to ride up as she waited for her trainer ahead of time.

Cody started to say hello to Jack. He had almost forgotten about her appointment when he realized that he could mostly phone it in with the shark as he walked out to the gym floor. What he saw there almost didn't even look like the same person. The shark appeared to have undergone a two-month gear-induced contest cut in the last WEEK. All her baby fat had burned away replaced by wiry muscle and he knew she had to be a few pounds heavier despite losing all that body fat. "Ms. Maraja.... Uh it looks like you CLEARLY stuck to the plan I gave you," he said as he wondered if Jack had some kind of twin who was in shape. "In fact I'm kind of shocked," he couldn’t help eyeing her tits which had to have grown several sizes and were now straining her too-small top. It made more of her bare stomach show which was now sporting a solid six-pack. Cody scratched his chin wondering HOW Jack had managed all this. "Uh Jack you haven't been offered any uh ‘supplements’ from any of the members here have you?" Cody asked knowing that roids flowed freely in the locker rooms at this gym but fearing that Jack was going to mess up her body by jumping into the deep end too fast.

"Huh? No. I haven't really talked to people a whole bunch," she shrugged, and gestured to some of the other gym goers. One pig girl was glaring daggers at her, the girl in question looking exactly the same as she did last week. "Besides I, like, have a whole DEGREE in that stuff, no way I'd just take something random from a locker room... OH! Although maybe I should? Not, like, swallow it, but just get it to study it and see what it is. That sounds like a lot of fun."

Jack seemed a lot more energetic and perky talking about messing with steroids than she ever had about the actual workouts, which was suspicious... but her red-striped skin didn't -look- like it was greasy or going to break out. Although it could be tough to tell with anthros, especially sharks.

Cody facepalmed as he looked at Jack. "Please don't. They CAN work but they are also very dangerous," he said quickly. It was also the policy of the gym that its trainers couldn't sell, distribute, or administer anything illegal like injectable roids or certain substances. The trainers did of course but it was all kept on the down low since about 80 percent of the furs and humans competing were on something unless they competed in a class that did a lot of testing. "Still I would like to know how you managed to drop so much fat and gain so much muscle in only 9 days," Cody said as he set up the bench press for Jack and noted that her top was VERY much too small for her now and was she a bit taller too? He had never heard of any drug that made your tits bigger or every woman in the gym would be on it.

"Lots of megavitamins, some creatine, some hormone-encouraging herbs, a lot of steak..." Jack ticked off on her fingers, "Curling with one hand while I fill out forms, running everywhere... just... stuff. I get a lot of time watching centrifuges at work so I might as well do pushups, right?"

The shark girl looked up at her trainer, then quirked an eyebrow, rapidly raising her chin up and down as she seemed to notice her own slightly changed perspective... but didn't comment on it as being anything interesting.

What in the world were megavitamins? And what kind of herbs was Jack packing away? But Cody DID know that her strength had taken a huge leap forward. Weights she had struggled with before she breezed through, and while her form wasn't much better she wasn’t getting tired after he made her do extra sets the right way. In fact they went almost 30 minutes over time with him TRYING to wear out the shark but she just kept lifting, still spacing out a lot and not showing particularly good form. Only now her top was damp and it was making it cling to her pumped up chest and tits in a manner that Cody couldn't help but enjoy a little. "Well, I think that will do us for today," Cody said as he put the plates back on the rack. "Just keep doing whatever it is that you are doing right now, but let's meet back in a week ok? You seem to have great genetics for this and if you want to push further you will probably need to train with me a bit more," said Cody wondering if he could suss out how Jack was managing to grow so fast.

"Oh for sure for sure! All the same!" Jack grinned wildly as she took off, flexing a few times in the mirror experimentally and not really getting much. She was lean, sure, but not really buff.

Next time, she was buff.

The next week Cody arrived to Jack casually pumping warm up weights that wouldn't look out of place with a professional. Her biceps had become defined peaks, a little vein sticking out with every pump... but it did nothing to distract from the rest of her.

She'd traded up for a pair of yoga pants that did nothing to hide her widened hips and toned thighs, and her top was now full on athletic support trying desperately to suppress a pair of D-cups. Even her hair seemed healthier, red waves cascading down off of sculpted shoulders as she shook her head out

Cody had come out a little early for Jack's appointment and was shocked to see Jack was already there and she had already worked up a sweat. She was getting looks from the regulars since no one seemed to know who this new sexy shark girl was. She had the popping muscularity that bikini and figure athletes attempted to develop and Cody SWORE she looked taller though that might have been her ramrod straight posture from her bulging glutes and now wider back.

He had to say her name several times as he watched her curling in front of the mirror. Her eyes were laser-focused on the image there and she seemed to be somewhere else until Cody touched her shoulder and the weights dropped. The veins in her biceps throbbed and pulsed slightly as Cody's eyes went to her even larger tits and then back to her eyes. "Wow. Ok Jack You have to level with me. What exactly are you doing between sessions? I don't think progress like yours is possible even with the best gear," he said quickly, more than a bit amazed at how she had been able to pack an entire year of focused lifting into basically three weeks.

"Hmmmm~" Jack smiled, looking flattered, but making sure nobody else could hear them before she responded. "You still have an NDA, right? Part of your 'training for the elite' services? If you can keep a secret I -guess- I can tell you. Part of why I made sure to come to the best~"

The increasingly hot nerd waited for a response before she admitted to anything, but by the way she couldn't help but grope her own abs idly. It was clear she wasn't entirely used to her own progress either, and her glasses flashed red.

Cody blinked at the odd expression on Jack's face and the slight tint of blush on her cheeks. He noticed the way her hand was sensually running over her eye-popping abs and remembered the way her eyes had been devouring her own image in the mirror. Most of the people in his gym got off on themselves a little. Anyone who worked and sweated as much as they did, investing in their own bodies for hours on end was a bit vain. Cody would sometimes flex in front of a mirror after a pump and, when at home, had done more than that until he had blown a heavy load all over the mirror. But Jack seemed even more captivated by her new body as the dented outlines of her nips and a slight hint of aroused shark scent in the air indicated.

"Of course. I couldn't tell anyone anything unless you allow me to," Cody said more than a little excited at Jack's secret. Just what had the brainy shark cooked up that was causing her body to change so rapidly?

Jack took a deep breath... and took off her glasses. In a Hollywood movie this might be the moment her true beauty was revealed, but she actually looked much worse, suddenly having to squint and scrunch up her otherwise pretty face to still see.

She moved the glasses towards her trainer, showing him the inside of the lenses... a picture of her actually visible on an integrated screen, showing detailed information on hormone profiles, nutritional intake, right down to what her body was using at that very moment.

Some of the things that stood out were the 5 digit number of daily calories being used.

And the estimated strength output.

"I'm testing our latest project. It's an extremely sophisticated suite of body monitoring computers threaded right through the body itself. There's some feedback in the parasympathetic nervous system that people were worried about, so I'm stress-testing it by..."

Jack snickered.

"Sorry, this phrasing just occurred to me. By jailbreaking my endocrine system."

Cody blinked since a lot of the numbers didn't really mean much of anything to him but what he did recognize seemed possible. Jack was eating like a powerlifter. A male powerlifter. She should have been a bulky tub of a shark but wasn't. He didn't trust the "projected strength" numbers since there was no way a computer could accurately predict something like that but IF they were correct she was stronger than she looked. Cody looked down at the shark, noticing how close she was to him. "So your super smart watch can just optimize everything and give you THESE results?" he said trying to keep the greedy tone out of his voice.

Jack slid her glasses back on, blinking a few times, "Yyyyyes. Pretty much! Although I have also been working out like crazy. It helps that my stamina has gone up much faster than everything else. I pretty much have to go nuts with the handstand pushups if I want to get to sleep at a reasonable hour." Jack held her arm out and turned it back and forth, examining her steely, striated forearms... and making sure she wasn't actually wearing a watch.

Cody nodded understanding somewhat. "Well, I have been planning your workouts around someone just starting out with not much stamina. I think it's time I bumped you up to the pre-comp workout. Get ready, because today you are going to lift for three hours straight and your body is going to HATE me," Cody said  as he added more weight to the bench behind them and pointed to it. If your tech doohickey can really do what you say you owe it to yourself to push your body. It's the only way to see what it can really do.”

This workout was far different than the last two. Each lift was five sets with the fifth going to failure and Cody made sure that Jack failed. He hit EVERY muscle group forcing Jack to work each muscle until it was dead. She sweated right through her top and yoga pants, leaving a trail of sweat behind her at each station and still Cody kept pushing like a slave driver. Strangely Jack seemed to be enjoying it a little TOO much. He had seen women have core-gasms during workouts, but he would occasionally catch her biting her lip while her legs shook as she pushed or lifted. When they finished Cody saw that Jack was barely hanging in there but she was sporting an absolutely savage pump. "So what do you think of your first REAL workout?" he asked with a grin.  

"Grghlflag," Jack said eloquently, her body feeling like recently pounded mochi.

...Well, pounded, and a little bit horny. She had to admit the exhaustion was amazing, and REALLY pushing her strength to the limits was downright... addictive. Or at least, she -would- think that, right now she wasn't thinking much of anything at all.

Instead her glasses flashed red, the program going into overdrive to force her body to recover. Her heart was pounding, pumping so hard that Cody could -see- the pump in her limbs, blood flow aggressively slamming into every muscle she had... and not backing down.

Jack sprawled out on the floor, one hand just above her crotch. It was twitching and Jack had an odd look on her face. Half pleased, and half pained, and with a little horny sprinkled in. "Jack are you OK?" Cody asked as he slowly lifted her upright, noticing that some of her major muscle groups were twitching, and her pec and chest work had pushed her enlarged tits even tighter against her top. Jack let out a half moan, half groan and Cody grew more concerned. He carried the surprisingly heavy shark back into his office and quickly got a sports drink as he snapped his fingers in front of her snout. "Jack! Earth to Jack!" he said before finally cracking open some

smelling salts and waving them under her nose.

She snapped back into it with a "Huh? Ah! Ah, yeah I'm fine. That was just a little... overwhelming..." her hands went to her abs again, the thick, swollen eight pack practically shaking from the memory of how it felt to really push herself. "I might really need to step up my workouts. Push myself that hard more often. MUCH more..." A small alert in the corner of her glasses told her that her pleasure centers were glitching out, a small, easily ignored pop up that said 'excess strength usage may cause orgasm'

Jack was all grins again

Cody nodded. "You are at the point now where you probably can't get in a good workout without a partner. I could bump one of my regulars off and train you three times a week at the same rate but I want something from you if I agree to do that," said Cody carefully. He wasn't sure if Jack would be willing or even could do what he was about to ask but he couldn't NOT ask her about it. He had stopped training for competitions last year because he just couldn't keep up with the best anymore. He was still huge and cut by regular standards but if he couldn't be the best why compete? "I want one of your devices. I want you to jailbreak my body so I can start competing again," he said. "If you can do that I will train you as much as you want, and I KNOW you want to get bigger."

"I don't know how wise that is... I'm still shaking out the... kinks..." that last word stuck with her, staring at her trainer's muscular body. She couldn't believe how horny she felt, lust cutting through her exhaustion and beating it back.

The idea of an even MORE muscular Cody, heck, of a more muscular EVERYBODY flashed through her head, and she couldn't see a problem.

"...Give me one more week. I'll keep up at this level of workout, and I'll check to make sure it's safe to give other people."

Cody slowly nodded as he watched Jack's eyes flash and as a hungry look darted through them from behind her glasses. He had to put his foot down. "Fine. One week. You come in next week and if you can give me one of those things I'll make you my primary client and you can have me on call. Anytime you want 24/7 but only if you can get me one of those devices," he said putting his foot down. "Otherwise you are going to have to find a new gym," he said, crossing his arms over his thickly muscled chest. "Besides, don't you need more data anyway? Wouldn't male data be helpful or whatever?

Jack actually giggled at that, leaning in and giving Cody a kiss on the cheek... before blushing deeply and realizing what she'd done. "You're bad at negotiation... but I guess so am I. Don't worry handsome, I'm just making sure you won't literally explode, I'm not going to run off on you."

She started to leave, but carefully watched for his reaction on her way out

Cody had been shocked by the kiss but recovered quickly. He was a young man in his prime and was perpetually horny like most who worked out in this gym and wasn't surprised at Jack. He had caught her meat gazing a few times in their last few sessions which was unavoidable when you bulged a pair of gym shorts like Cody did. Being fit and being horny was all too common and he allowed his eyes to roam over Jack's yoga pant-clad ass slowly. "Mmmm glad to hear it. I'll be looking forward to next week and seeing just how much you are able to grow then," said Cody, aware that his cock was starting to swell and bulge outward down one leg of his gym shorts.

Intense.

That was the word for the next week. Jack kept pushing her body to the limit, to that moment on the edge when she would almost collapse and climax all at once. And every time she would carefully record her changes... and update the experiment.

She came away with delightful findings. There were no negative side effects whatsoever.

A ton of side effects, sure - her libido had tripled, her pussy was now visibly large and muscular through any pants she tried to wear, her E-cup chest had started lactating, and she felt an immense desire to make everybody as big as she was...

But no NEGATIVE ones.

She hummed as she packed up her lab kit to take to the gym, her trainer would be so happy she could work on him.

Especially since she had caught up to him in musculature

Cody was working in his office when the door bounced open. A figure filled it, shoulders edging towards the edges of the door frame. Massive tits sitting high atop pumped up pecs and barely hidden behind a top that had no chance of hiding them, nipples that were thick and hard, poking at the fabric as if they were trying to burst free. Cody's eyes moved downwards to a shredded eight-pack and a wide pair of muscular hips that framed a bugling muscular cameltoe and clit bulge you could see from space in her too-tight yoga pants. Cody could see her glutes from in front of her as her thighs rippled and bulged sweeping out so wide he knew she probably waddled just a little.

"By the Gods Jack!" he said, stunned at the sight of the now massive shark. She looked like a contest-ready heavy-weight female bodybuilder and while she didn't weigh as much, her muscular development was better than he was. It seemed like she had already warmed up since she was sweating lightly and had an almost feral look in her eyes. Cody was instantly hard as the strong scent of horny shark wafted into his tiny office.

"Nope, by me~" she teased, pulling out her briefcase and opening up a multi-layered set of glassware and a few humming motors. "Turns out it's a perfect success. And I'm more than happy to share it. Just a warning, though, it'll take me a few hours to treat you, and you'll feel like eight miles of bad road for 24 hours afterwards... so I guess I'll ask."

Silvery fluid in a syringe spun with a dull hum as she paused, "Wanna try a DIFFERENT sort of workout one last time before I give you the good stuff?"

Cody looked at Jack in all her pumped up glory. She seemed to fill the room with her presence and raw sexual energy. She had that cocky attitude that competitors seemed to exude. Her whole personality seemed to have changed since she had started with him only a few weeks ago, and Jack seemed somewhat drunk on her own body and power. Cody had no problem with that.

Her nipples had gotten somehow harder, poking further through her top and a wet spot was starting to form over the obvious bulge of her sex and jutting clit. Cody swore he saw the horny shark’s clit jerk a little as he pulled her next to him, noting how SOLID she seemed. “Mmm fuck if that stuff is anything like regular roids I’m sure you hadn’t been able to keep your paws off yourself have you? Always loved it when I was on a heavy cycle, I could fuck for DAYS!” said Cody as he hooked his fingers into the waistband of her yoga pants. He had to struggle for a moment to pull them down to Jack’s knees before he pulled her upwards kissing down her hard abs, mouth headed for the vee of her crotch.

"Wait you did regular roids? Naughty Cody!" She teased, wrapping her tail around her massive hips and cradling the back of Cody's head, "helping" him towards his target. "Those things can have some serious long-term health effects." Jack idly toyed with one of her nipples, a few drops of milk starting to bead from the simple stimulation as she shuddered. "As opposed to these, which have long, long, long, long term health effects. I feel like I could fuck for CENTURIES."

Cody felt her grip the back of his head. It was gentle but insistent as he kissed and licked his way down her abs. He felt her flex them as he did, their already eye popping definition growing even sharper. Her scent was overpowering and it was getting harder to think. Cody had been with more than a few anthro gals but none of them had made him feel quite so lust drunk as he felt himself being pushed downward while Jack's hips rolled upwards to meet his face.

At some point his knees hit the floor and Jack's bulging thighs were bracketing his head. His chin bumped Jack's oversized clit and he was shocked at how hard the thing was. Girls who went on gear sometimes grew quite a bit. She didn't have the biggest roid clit he had ever seen but she was very healthy. Cody sucked her throbbing love bud into his mouth as his fingers traced her very wet entrance, eager to see if her added size had come with added sensitivity.

"Mmf~" Jack tensed, pinching Cody's lower lip with a pair of her own, her thick vulva reaching out to him as he teased her button. "I hope it's still soft down there, otherwise you're gonna hate this~" Jack shoved, tail pulling back hard as she practically facefucked the poor human. "GOD that feels amazing. EVERYTHING feels amazing. Don't hold back," She grinned, a gesture lost behind several feet of height and an overhanging cliff of abs and tits, "I want to add 'multi-orgasmic squirter' to the list of side effects."

Cody wasn't quite ready for what happened next. For Jack to react so aggressively as soon as he inhaled her clit, her hips thrusting forward. Every muscle in her lower body seemed to tighten and strain as he felt her 2 inch clit hardened and throbbed with need inside his mouth. One paw kept a grip on his head, not letting it move as he heard Jack say something before the sounds dissolved into grunts and moans.

Cody had never had a woman try to fuck his face, but there was a first time for everything as he pushed his tongue and fingers into the twitching shark before he felt a gush of honey slap him in the face and he felt Jack's body flex HARD. She held that flex, veins swelling and popping all over her thighs, clit thicker and harder than ever as Cody tried to pull his head backward to take a breath. Jack's grip didn't loosen as he felt the flex relax slightly before she began thrusting into his face all over again.

"That's one," Jack's voice didn't even waver, her brain buzzing on a high of endorphins but upgraded too many times to be bothered, "How many do -you- think you need to do to earn the same from all this?" She reached down, picking Cody up and casually guiding his kneeling form to a nearby bench, laying him across it and shifting her position to sit on his face, making herself -comfortable-, and giving Cody front row exposure to bubbly cheeks with a core of pure iron. "Then again, if I dial up my pheromones again I bet I could make you cum just from eating ME out."

Cody's brain was mush from the hormonal assault as heard Jack say something but he couldn't make out what it was. He was then tossed onto an old bench press that he kept in a corner of his office with enough weight for him to rep occasionally when he got really bored. Cody's prick was throbbing and drooling pre and at some point, it had popped out of his gym shorts. He was just a hair above average in length for a human but very thick as he blinked and seemed to come back to himself just before Jack promptly sat on his face.

She was heavy enough that her full weight would probably have smothered him, but between her grip on the bench and her powerful legs, she balanced, driving Cody's tongue up into her clenching pussy while her clit ground against his chin. Cody's brain was again hammered flat by the hormonal overload as he felt her start to work herself back and forth, using him for her own pleasure.

Jack came again. Getting more sensitive and more horny by the minute in equal measure. Messy jets of fem cum sprayed down Cody's front, soaking his pecs in fluid that tingled wherever it touched. Everything smelled like honey and energy, like the atmosphere just after lightning had passed. "That's two," Jack's whole body shudders were indistinguishable from flexes after having been built up so much, and she was practically giggling from the euphoria, "If you have any changes to our arrangement, be sure to say them -real loud- into the opening."

Cody was having trouble breathing as Jack's thighs and ass clenched and FLEXED again. She poured out another larger wash of fem honey all over his face and chest. His jaw was sore and tired and while Jack was delicious, he needed a break. Grabbing her ass, Cody pushed and pressed the entire shark upwards holding her there while he gasped and panted. "Gods woman, you don't have an off switch do you," Cody moaned, fighting against the tide of musk and hormones swirling around his small office. His eyes locked onto her pussy again, even plumper after two back-to-back orgasms and his arms trembled a little but his cock was throbbing and he wanted to know how the shark felt wrapped around him. "How about you test that sweet gusher of yours out on something more substantial?" he said, still holding Jack up over his body.

Whumph

Jack pushed him aside like his strength was nothing... and rode his cock as casually as can be. "Nope, no off switch anymore!" She cackled as she toyed with her swollen clit, teasing it around Cody's cock and practically frotting the two even as her lips sucked him deeper. "Only one button, it turns me on, then it turns me even more on!"

Jack crossed her arms over her chest, looking down at her 'trainer' with amusement as she closed her eyes and focused, using kegels alone to milk him as she saw just how much work her pussy could put in. "I do have a few booleans, though, and 'pregnancy' is set to false; so you cum just as hard and raw as you want."

Cody arched as Jack slid down his prick and took him in one smooth stroke. It was clear that she was built for more cock than he possessed, some fur fems were, but still, she was so TIGHT and that was before she clenched and literally milked his cock with her rippling pussy. He arched and moaned, bouncing her a little but she seemed to ride him with perfect balance not bouncing on his cock but just... working it over and over, her abs visibly clenching and rippling while she fingered her clit.

Cody had no idea what a "boolean" was but his male brain heard when she said "cum" and "raw" his male brain picking out the words selectively as his control grew more tenuous. Had he not known better Cody would have sworn that Jack could tell that he was getting close because her pussy seemed to flog him harder and harder, her abs dripping with sweat. In fact Jack's whole lower body looked like it had a solid pump. " JACK... CAN'T HOLD BACK~" he moaned as he grabbed at her hips and Cody's cock erupted inside of the muscled up shark in long shaking spurts.    

Jack didn't want him to. The load was very respectable for a human, but even unenhanced she could still have handled it without spilling a drop. As she was now... well.

Jack carefully regulated her muscles, squeezing around Cody's cock, holding him hard like the greatest cockring. "Y'know I think you lost it even faster than I did, stud." Somehow the nickname didn't sound sarcastic, despite the surrounding words. "The question is, do I just keep fucking you, or do I show... mercy."

Cody started to fall into a post-orgasm haze when he felt Jack move her hips forward slightly and then CLAMP down around the base of his cock. Cody was so sensitive that he squirmed as he tried to pull away only to feel Jack's thighs squeeze him just tight enough to hold him. "GODS give me a second!" Cody panted as he felt her squeeze him lightly once or twice. She did not seem ready to let go and he wasn't pumped full of her super roid yet. "Look I'm all for going another round but I'm still human at the moment, I'm not a machine," he said as his cock throbbed inside her, his body still not softening. He wasn't sure what the wild-eyed shark would do as her eyes practically glowed, her stair pinning him to the bench.

"Oh! Of course!" Jack said brightly, her smile suddenly turning benign as she raised herself off the human and sat next to him. "I find that the sex crazy routine really kills with a figure like this, and I think little Cody agrees," she adjusted her glasses, the thin frames having stayed on the whole time, a blue glare highlighting her bright eyes and hair that had only barely gotten shaggier now that it was sex hair. "But I'm still a doctor. I can start the treatment whenever, or get you some milk if you want to keep trying~"

Cody blinked and noted that Jack's already impossibly firm and prominent tits were just a bit more full-looking than they had been when she had come in. They were also leaking milk from VERY hard nipples. His brain locked onto them as indecision gripped him. Cody wanted Jack's super roid inside him. If it could transform her into this, what could it do for him? But her tits looked so lovely, and milk was dripping off them. "I want it but MMMMHHHH," Cody moaned as he moved upwards and sucked one of Jack's thick nips into his mouth and was rewarded with a gush of warm shark milk.

"Yes, yes, I'm irresistible," Jack teased as she cradled his head and let him suck, relaxing her chest and letting thick, rich milk pour freely. Compared to any kind of store bought milk it was much thicker and... kind of tangy. But smooth and energizing. "Honestly I feel a little silly getting milky with a body like mine, but it turns out that this is just what -happens- if I turn hormones, metabolism, and cleanliness on max. Be sure to tell me if you feel weird, drinking pure Amazon T-Juice, heheh."

Cody only half heard her words but the milk was already working as suddenly Cody felt his cock twitch then throb. Cody had tried Viagra recreationally a few times and while the drug gave him a headache, it did give you an erection that could split wood though. This was MORE than that. His cock suddenly felt like a solid iron bar and his balls two sizes too small as he popped off her tit with a grunt. "FUCK WHAT'S IN THIS," he moaned as he mashed his lips to hers, his cock pressing against her abs, thicker harder, and longer than he had ever been as he drooled pre everywhere. He tried to push Jack down onto the bench but the shark did seem to move much as he grunted with impatience.

Jack rolled her eyes slightly as the human tried to tackle her and mostly just made her bounce a little bit, but only slightly before she threw them wide and gave an exaggerated gasp, laying back and spreading her legs again, pussy still more than at the ready, "OH YES, YES, TAKE ME YOU BEAST! And also maybe get some relief while I make sure you won't have a heart attack, I had no idea my milk did that."

Cody spread his arms wide and hooked both under Jack's knees as he pushed her legs back towards her chest. She was well-muscled enough that it did amazing things for her ass as he slowly bent her into a matting press, those powerful limbs only allowing him to do so when they chose. Her pussy was still frothing and plump as Cody pushed himself forwards, his tip spreading her open as he began to hammer strokes into her with a chemically enhanced vigor, watching Jack's face for when his strokes hit home. Unsurprisingly she seemed to enjoy it most when he could put pressure on her big clit, so Cody did, and was able to lick and suck on one nipple while his hips kept pumping.  

Jack almost came again from the ripped stud going at her clit like that, then she realized it might not be safe, and her bodily fluids might be too much for people without her extensive modifications, trapping them in a lustful frenzy. She'd need to hold on to her milk and her pleasure if she didn't want to go around making herself a harem of frenzied worshipers.

Then she realized how hot that was and came anyway, another gush of thick honey across his hips as he continued to drink the powerful - and possibly addictive - nectar from Jack's chest.

A thrumming throb began to run through Cody’s head. He could feel his pulse beating behind his eyeballs, but the macho muscle stud was too horny to care as he kept pounding Jack's magic pussy. At some point between gulps of her delicious milk, he had cum once, maybe twice, he couldn't really remember. His balls were still too full, his cock still too hard to stop as he POUNDED Jack. All 250 pounds of Cody were thrusting downward into the shark hard enough that any other woman would have wilted but her body seemed built for it as Cody felt his balls pull up into his groin heavy and full of seed.

He roared, hilting himself inside her, and came again, jet after jet after jet, his cock aching for being forced to stay hard as his body started to tire again before his lips locked around her nipple and he sucked another mouthful of milk into his stomach as the flames of lust roared back to life.

After the first orgasm, Jack looked to see if he calmed down. After the second, she grabbed the needle. The third time he came, Jack struck, stabbing an ice cold needle full of silvery fluid into the base of Cody's spine, inhuman precision sliding it between the bones even as he thrust furiously... and Jack pressed down on the plunger. A sensation like ice crept up and down Cody's spine, and his heart began to slow and calm even as his orgasm extended for jet after jet after jet.

"You alright?" Jack asked nervously, a hand reaching up to hold his arm and hold him off of her slab of abs and chest.

Cody could only moan as he felt Jack squeeze around his prick which was finally starting to soften. The cold feeling rolled through him as Cody slowly pulled out of Jack with a sticky pop. An obscene gush of seed and shark honey dribbled out as the world spun around Cody. His body felt weak and distant as the tech she had pumped into him started to go to work. "Nghh yeach~" Cody slurred as his brain seemed to fizzle and short out a bit while he smacked his lips. "Mmm milk good," he grunted looking at Jack's leaking tits but no longer having the energy to reach them.

"Milk in small DOSES good. Taking that much of a stimulant when small doses do... that... to you very bad." Jack sighed, standing up and catching Cody as he fell, depositing him on the bench as he began to fall asleep. "I had to dose you with the regulator just to prevent you from going until your heart exploded... or I beat you off, but that would probably be equally lethal. I'd hoped to do this in more controlled conditions, but just sleep for now. When you wake up you'll be on your way to becoming a big strong superhuman."

Jack's glasses shined, the reflection in them showing a number of screens and readouts as she tapped into the regulator she injected him with. "Any last requests before I spend the next few hours making sure it doesn't accidentally set your baseline level to 'in the throes of orgasm'?"

Cody didn't really catch much of what Jack said and was only able to mumble out," Wanna be biggest stud in the gym," he said eyes flickering as he blinked and passed out completely.

: "Hah!" Jack tousled his hair affectionately, "Oh hon... not achieving THAT isn't even an option."

Jack decided to spend the next week being -practical-. She turned up the gain on her self-control, since her libido was just going to keep increasing and she'd much prefer only explosively cumming when she -meant- to. She upped her pheromones to 'hypnotic' levels (mostly so she could rush through the FDA)... and she started selling her milk as a designer drug. She had to. For two reasons.

One was that so she could start spending more money on... extra space. And clothes that fit. And just generally not stressing.

The other was to let her boytoy catch up a bit when she met him for their next session. It'd be good data to know how well her project worked on somebody who practically lives in the gym

Cody came in from his morning run still buzzing with energy. It had been that way every day since Jack had pumped him full of whatever the hell was in her super roid cocktail. He stripped off his clothing, his erection bobbing like an iron pole in front of him as he strutted over to the mirror. Cody was the proud owner of a new fearsomely thick 10-inch prick that never seemed to tire. He had to jack off a few times each morning before his run just to calm down and his tangerine-sized balls pumped out porn star-quality loads, each one as voluminous as the last.

He pulled his arms up watching as the muscles in his chest and arms all jumped. Veins popped everywhere and he had never looked so lean. Cody hadn't been this big even when he had been in his prime and he felt so damned STRONG. His cock shot a thick wad of pre all over the mirror as he grunted his mind flicking back to Jack. He hadn't seen her since that day at the gym and the ache in his loins was going almost painful as he snapped another progress pic of himself and sent it to her hoping the measurements he had sent the day before had been useful for her notes. He quickly sent a message inviting her over as he moved to his home gym set and began pumping out incline bench reps, feeling the burn in his massive pecs while his prick drooled everywhere.

Jack was busily failing to design a vibrator tough enough for her when she got the message... and the invite. Cody had really kept her updated, making sure to show her his biceps getting visibly bigger every day... the fact that his bulge was always rock hard and -also- getting bigger was more of a fun extra.

She supposed she'd let him stew long enough, and it would give her a good chance to check how well a premium home gym worked with their new needs.

Plus, it had been a while since Jack had clocked her speed improvements. A quick sprint over the miles to Cody's house got her flushed, warm, and sweaty enough for her tank top to cling to her tits by the time she made it to his door... which she knocked on, as gently as possible. They probably didn't have a 'tear her way inside' relationship yet.

Cody was almost 45 minutes into his chest workout, his pecs and arms feeling pumped beyond belief when he heard the knock. His senses seemed turned up to 11 these days as he re-racked the bar, all six plates rocking slightly. Cody let out a grunt, his pecs heaving as he sniffed and scented Jack. How he knew it was her from across the house he wasn't sure but her scent seemed hardwired into his brain as he loped through his house like a great hunting cat, showing agility he hadn't possessed even in his teens as he threw open the door.

Cody's expression went almost feral for a minute as he stood nude in the doorway drinking in Jack. It seemed she had grown a bit more since last time, and a not very human sounding growl slipped out of his lips before his cock bucked and shot a thick line of pre past her. His eyes seemed to lock on her heaving chest as tried to summon up thoughts but it was so hard as another grunt that sounded almost like "come in" slipped out.  

"Aw shit he's gone feral," Jack whispered to herself, adjusting her glasses but accepting the invitation and heading inside. The whole house smelled like cum, constant spurts saturating the house in a way that her own cloud of pheromones only barely kept at bay.

Jack quickly evaluated her boytoy, half watching her glasses and half watching him. From staring at his slablike, overpumped pecs she could tell he was... hot as fuck. And those ABS, goddamn that eight pack already matched hers. But from checking the monitors she could tell that his testosterone had spiked after the workout... and it was already set to a baseline that would kill an unmodified human.

She crossed her arms, making sure not to show weakness, and decided to at least take the -chance- that he was as good at controlling a super body as she was. "Enjoying your changes, hon? I'm always open to constructive criticism."

Cody was watching Jack the same way a tiger eyed its next meal as he saw her mouth move and heard the words. They seemed to mean something to him but it was soooo hard to think after a workout. His body pumped load after load directly into his brain that was already pickling in testosterone and it felt GREAT. That made Cody want to lift more and jack off again and again which is most of what he had been doing the last three days when he wasn't out for food.

Something in his hindbrain noted as Jack eyed up his pecs so he slowly flexed each one showing off his muscle control, making the muscle fibers roll up then back down before bouncing both. It seemed very important to improve his muscles and lift more. He couldn't remember exactly why he was doing it but it felt so good and thinking was hard. The pressure in his balls seemed to spike so Cody clenched his groin and kegaled as a spurt of pre was launched 6 feet from him to land with a splat against the wall. "Nggghhh~ I feeeeel sooooo goood! Want MORE!" he said licking his lips not even sure if he was talking about more of the stuff Jack had pumped into him or if he meant her luscious body.

"Alllright that settles it," Jack rushed across the room in the blink of an eye, picking Cody up bodily and teasing his nipples with a long tongue... before flexing, HARD, her hips and ass almost doubling in size and bursting her pants in a mere moment. She slid the scraps off herself with her tail, before wrapping it around Cody, guiding his legs around her as she held him up by the core... and pressed him deep as wrapped her massive pussy around his cock, TIGHT.

Her own kegels instantly began to milk him harder than an industrial stud farm harvester. "I guess I have a civic duty to DOM THE SHIT OUT OF YOU. Once you learn your place beneath your goddess we'll see how much more -responsible- you feel~"