Alex 4

A couple of months went by and Alex kept lifting and growing seemingly right before Ken’s eyes. He was now masturbating daily, twice a day, sometimes more, inspired by his sister’s incredibly erotic muscles. For her part, Alex only encouraged it, wearing skimpy and tight outfits, walking around in her underwear, and doing anything she could to show off her muscles. She would even drop comments, telling Ken, “here’s something for the spank bank” while giving him a bloated side chest pose, or “go stroke it to this!,” while doing a massive meat-wing lat spread.

One night she decided to take things a step further. Their parents were away, and Ken was out late for some school thing. That gave Alex the perfect opportunity to surprise him with something special when he got home.

She began to choose her outfit.  A super tight mini skirt with a slit on the thigh looked awesome.  Her colossal thighs made the skirt extremely tight, accentuating their enormity.  The slit was on the verge of expanding because of their girth.

Her top was a simple one.  But when you possess the muscle mass Alex now did, the top was not simple.

It was not designed to show cleavage.  It did on her, though her cleavage was nothing but ripped pecs.  It was not designed to show her abs, but on her it showed the bottom half of a deep-rippling six pack. Her gigantic biceps were exposed.  She walked over to the mirror and liked what she saw.

"Damn!  I look awesome.  Just look at those thighs.  My top is so tight with these thick pecs. I hope he can handle me."

Ken got home not long after. What Alex opened the door, his reaction is just what she expected.  His eyes grow large.  He stares at the incredibly muscular, well-endowed vision before him.

Ken says, "See anything you like bro?"

Ken blinked, so stunned that he didn’t even realize that his cock is clearly visible through his shorts.

"My god, Alex!  You’re huge!"

Alex smiled seductively. She then began to slowly flex her biceps.  He stared in awe.  He was not prepared for this display.  Women just don't get this huge.  Alex was massive.  He reached out to touch her muscle.

“Go ahead,” Alex encouraged, “feel this massive arm!”

Ken reached out and grasped the surging bicep. "This thing is rock hard!  Just how big are you?"

"Big enough to do this!" Alex then flexed her pecs and lats.  The sheer size of her chest caused the halter-top to open in the front.  She then flexed her shoulders and lats again and the blouse ripped and fell to the floor. She then flexed her thighs and her jean shorts ripped up the side.  Flexing her glutes, the shorts tore off her body and fell to the floor. Now she stood before him, clad only in a tiny g-string.

Ken continued to stare.  This was impossible! She was huge!

Alex began to slowly saunter over to her brother.  She bounced her thick pecs.  She flexed her abs and he watched them bulge with rippling muscle. Her thighs bulged out with each step to an enormous size.  Even her calves bulged out from her body.

She stepped closer to him and said, "So what do you think?"

“I.. uh,” Ken stammered, “Think you’re amazing! You’re built like a brick shithouse!”

Alex positively beamed. Then she asked, “And that turns you on, right?”

This one question marked a complete turning point in Ken’s thought process. Up until now, despite how much her muscles had turned him on, Alex was just his sister, and thinking about her with lust was wrong. But with her here, bulging huge, in front of him, any inhibition Ken had was completely overcome by his lust for those massive muscles.

“Oh, Alex, you’re the sexiest thing I’ve ever seen!” he practically shouted.

Alex chuckled, then continued her show. “What do you think of my pecs,” she asked, smacking fist against one. It made a hard slapping sound.

Ken reached out, but hesitated. Alex grabbed his hand and forced it onto her pec. The she flexed.

“Feel it, bro. My pecs are so fucking strong!”

Her nipples were erect, but the muscles in her chest were so bloated that her nipples pointed straight down towards the ground.

“Who needs breasts. They’re useless sacks of fat. I’ve got muscle tits!” she cried, and flexed into a most muscular pose. Ken was now hard as a rock.

Alex saw his erection in the mirror. “I see your dick likes my pecs. Tell me how fucking sexy my muscular pecs are” she said.

Ken became unraveled, the words spilling from his mouth almost uncontrollably. He told her that her pecs were sexy, muscular, and hard as steel. He told her that her muscle tits were the best tits he had ever seen, and they made him want to fuck her then and there.

“My muscle tits are so sexy I want to fuck myself!” she declared.

Ken looked down toward her pussy area, covered by the thin g-string. She was clearly turned on because the front of her g-string was soaked with her juices.

She took notice and said, “God, these muscles just make me so horny.” She chuckled, reveling in the shock on Ken’s face. “I’m gonna get even stronger, even bigger, and even hornier!”

Ken blinked. Alex, with the quickness of a cougar, grabbed Ken and pressed her lips against his. She used her thick tongue to push his lips aside and press into his mouth. Ken, overcome with lust, ran his hands all along her thick triceps, abs, and back as his erection pressed against her rippling six pack.

Then she reached down and tore her g-string off. Her clit was swollen and looked bigger than any Ken had seen before.

“Come suck cunt!” she commanded. Ken obeyed. He sucked and sucked until she came again and again. Then she pushed him onto the bench, mounted him, and proceeded to fuck him like an animal.

While riding him, she then flexed her biceps to their full size.  Ken was astounded.  She began to ride him like no one else could. She was doing things Ken did not think was possible, bouncing on top of him, seeming never to tire.

He was ready to cum.  Alex sensed it and grasped his cock. Ken looked frustrated.

Alex said, "Not yet, I want this to last.  It has only been thirty minutes.  I plan to keep you going for a long time!"

She then lowered her hot box on him again.

Ken thought, "Damn.  Her pussy feels hotter than before."  He looked up at her face and she looked down at him.

"Ken, I'm cuming!"  She was riding him like a horse. Bucking and shaking.

He was now reaching his orgasm. Alex realized this and grabbed his cock again making him suffer.  "Not yet!  I need to cum again!"

She mounted him again and rode him.  Ken was getting tired. His hips were tired from pumping.  He was not used to being on his back, and then pumping this massive, super sexed, muscle bound vixen was exhausting.

"Alex, I can't keep this up much longer!  Please let me cum so I can rest!  My hips are beginning to cramp."

Alex looked down at her sex toy and said, "I was hoping that you could keep up with me. But if not, at least you can feed me!"  She then wrapped her lips around his shaft and allowed him to shoot his load. She gulped it all down greedily as Ken came and came.