Serving Your Sister: Ch.2

The events of that  night were definitely pretty unusual, with Molly eating so much food and  you noticing her recent development, but you quickly forgot about it  when you went upstairs and began playing video games. Time flew by and  before you knew it, it was 2:00 AM. You took off your headset and went  to the bathroom to take a piss and get a drink of water before bed.  

While you were there, you head a weird noise coming from Molly's room.  It sounded like heavy breathing.  You pressed your ear to her  door, trying to listen, and leapt back in disgust when you realized what  she must be doing in there. No brother wants to imagine his sister  pleasuring herself, though a part of you was intrigued. Her bed was  making creaking noises, when all of a sudden the breathing and creaking  stopped. Maybe she knew you were listening! You went to bed  and slept late the next morning. 

You saw that Molly's door was shut  when you got up and it was still shut when you went down for lunch.  Seeing it still closed at 3:00, you decided to knock. It was unlike  Molly to be shut in her room all day and maybe it had something to do  with her being embarrassed about you hearing her masturbating the  previous night.  

"Are you planning on joining us humble mortals today?"   You heard the bead creak and the sound of footsteps approaching.   

"Tim, I don't feel so well."  

 "Oh. You want me to get you some medicine?" 

 "No, I'm not sick. I'm just...."   

You tried to open the door but found that it was locked.   

 "Molly what's going on?"  

 "Promise you won't freak out, okay?" 

 "Fine. I promise. Will you just tell --"   You  were cut off as the door opened and you saw your sister standing there.  

Well, it looked like your sister, except she was a half a foot taller  than she had been the night before and now had a pair of real boobs,  probably about a c-cup. She still had on the tank top from last night,  though now it looked more like a crop top than anything. You looked up  and down her body while she scanned your face, searching for a reaction  to her growth.   

 "H-how did this happen?" 

  "What do you mean?" she teased, winking at you. "Come inside. I'll explain."  

 She  pointed to her bed and you sat down, while she went over to her drawer  and pulled out two little pill bottles. You couldn't help but notice  that her rear had grown into a nice little bubble butt. If she wasn't  your sister, you'd seriously be eyeing her up. 

  "So you  remember my field trip to the chemical plant last week? Well, I brought  home a few souvenirs and lets just say, they weren't from the gift  shop."   

 "You mean those pills are from GrowTech? That's how you got so much..."  

 "Bigger?  I mean, can you blame a girl for trying? I've spent my whole life as a  pipsqueak, underdeveloped and neglected by the puberty fairies. When I  heard that they had a product to make you grow bigger, I jumped at the  opportunity."   "But Molly! You don't know anything about these pills, I mean the dosages, side-effects, consequences!"

   She  shrugged and stretched her arms up to revel in her new height. "Maybe,  but I feel fine. Fantastic, actually!" She gave her boobs a little pat.  "Not complaining about these either." She saw you blush and smiled  coyly.   

 "What will mom and dad think when they learn their daughter has taken experimental growth drugs." 

  "That's  the least of my concerns right now. Right now, I'm thinking about the  fact that I'm starving. Growing girls gotta eat, you know! Why don't you  go get me some food?" 

  "This isn't a restaurant, get it yourself!"

 Who did she think she was, bossing you around like that?  Molly looked upset at this response and scowled. She started to leave the room but turned at the last second. 

   "I'd  start being a little more respectful to your 'little' sister, bro. I  have a feeling I'm not done quite growing yet," she said with a smirk.   And  with that, she left the room and images of a taller Molly filled your  head. The thought turned you on, you had to admit, but it was still  terrifying. You had to find a way to get those growth pills from her.  Before she took it too far....

You were in a state of shock at what  had happened. How could this be? Your sister growing 6 inches and a pair  of boobs overnight? This went against everything you ever thought  possible or believed about science. It was incredible, it was  terrifying. Most of all, it was intriguing. You wondered if the GrowTech  company knew what kind of product was on their hands and your mind  raced thinking of all the applications it had. Soon, there would be no  more short people as everyone would want to grow bigger. The NBA would  probably be dominated by people taller than the hoops. But you were  getting ahead of yourself. For now, there was only one person that  mattered -- Molly.

You had to find a way to get those  pills back from her. She was already a little crazy but there was not  telling what she'd do if it meant she could grow bigger. And you had no  idea if the pills were addictive or anything.

You crept  downstairs, where Molly was absorbed by the fridge, looking for stuff  to eat. Her butt swayed back and forth and you felt embarrassed by the  boner growing in your pants. She had a great-shaped ass, it was a shame  she was your sister.

You looked on the counter but the pills were nowhere in site. Suddenly, the fridge door closed and Molly smiled at you.

"Looking for something?"

"Uhhh..."

"It wouldn't happen to be *this* would it?" She asked, holding up the pills.

"Actually, yeah. I think you should stop taking those, Mol. They could be dangerous and as your big --"

"Big  brother? Hm. Mayyybbeee for now, but certainly not for long. Especially  since I just took a double dosage of both pills. Mmmm I think I can  feel a growth spurt about to come on. Wanna watch "big" bro? Don't think  you'll be able to contain yourself when you see these tits get even  bigger."

She smirked and looked at your boner before wolfing down a slice of pizza and burping loudly.

Her eyes glittered and she kind of tensed up.

"Are you okay?" you asked.

"It's.. happening... again..."

You  were amazed as you saw Molly slowly began to inch upwards. Her bare  feet slowly grew bigger, as did the rest of her. As she grew bigger, she  seemed paralyzed, stuck in place. Her eyes were transfixed on the  ceiling and she looked completely unaware of her surroundings. You saw  her breasts swell, they were the size of tennis balls now and getting  bigger by the second. Her nipples were hard and they made two noticeable  protuberances on her ever shortening tank top.

Molly stood just  below your eye level now. She was probably 5'10'', while you were 6'1''.  She had a bit of cleavage showing and her boobs were probably a D cup.  She snapped out of the trance she'd been in and ran her hands over her  new body, spending a few seconds hefting her tits and squeezing them.

"So, Tim. What do you think of the new me?"

"This is crazy...."

"Mmm  I know," purred Molly. She turned around, showing her plump ass that  was stretching her shorts to their limit. "I think this thing is big  enough to twerk with now, don't you?"

"C'mon Molly, what the fuck. I'm your brother."

"Awwww  does my body make little Timmy uncomfortable? Get used to it, if I have  things my way I'm gonna be parading this ass and these tits all over  town. No boy will be able to resist me. You might be hearing a lot of  noise from my room at night, don't let it keep you up. Or do. You seem  to enjoy hearing your sister being pleasured."

You were  left speechless and even more dumbfounded when Molly extended and hand  and patted your raging boner. She grabbed it and leaned in to your ear,  whispering,

"Whatever I want, I get. I want you, I'll  get you. I want food, you'll get it. I want to grow? I'm going to  fucking grow. Got that?"

Her hand was tight on your  dick and you felt her nails starting to dig in. Her eyes were looking up  at you but you knew it wouldn't be long before you were looking up at  her.

"Got it," you whimpered. "Can you let go, Molly?"

"When I want to. You're bigger than I thought, Timmy. Or maybe your sexy sister is just part of that."

She  let go at last and took out the pill bottle, tossing back a few more.  She laughed, seeing your expression, and went up to her room, slamming  the door and playing music loudly. An hour later you got a text telling  you to bring her some food and leave it at the door. You initially got  mad at how bossy Molly was being, but you remembered what she'd said to  you. Might as well give her what she wants, you thought.

You  left it outside, as instructed, and went to bed. That night, dreams of  Molly filled your head. Nothing prepared you for the changes that would  come.