When Jenny heard the knock she ran to the door of her dorm room. Pete didn't even say anything when she opened the door, he just picked her up, kicked the door shut, and carried her to the couch. They were kissing before he even set her down.

Jenny got incredibly turned on from Pete's attention. After a minute he started covering her face with kisses. He brushed aside her long, blonde hair and worked on her neck until she squealed. Then he returned to her lips, teasing her with light pecks before passionately overwhelming her.

"That feels so good," said Jenny, "I love the way you kiss me."

"Well, you'll love the way I fuck you, too."

"Hmm, I don't think you've quite earned the right to do that. Have you broken up with Samantha yet?"

Pete pulled back a little and frowned. "Well, I'm not sure that I should. She puts out, unlike some people."

Jenny pouted a little and stuck out her chest. Pete enjoyed the show, like she knew he would. "I told you, once you dump Samantha, then you get to enjoy a fucking a real woman." Jenny was pleased to see Pete smile when she said that. From what he'd told her, Samantha never said "fuck" or any other "dirty" words when they were together. It was her loss since dirty talk seemed to arouse Pete tremendously.

Jenny reached down and began to stroke Pete's crotch. "How about I give you a little incentive to hurry up and break it off with her?" As a big smile crossed Pete's face, Jenny got off the couch and knelt in front of him. She unzipped his pants and pulled out his hard cock. Jenny gripped it with both hands, but didn't stoke it.

Watching Pete's eye's carefully, she leaned over and gave the smallest lick to the tip of the penis. He jerked a tiny bit at the touch, but didn't say anything. Jenny gave another tiny lick, then started moving her hands very slowly. She leaned in as if to lick it again, but smiled and pulled back before she actually touched the penis. Pete moaned lightly.

Jenny dropped the boy's straining cock and started taking off her t-shirt. "You must be especially excited about this. I swear your cock is actually bigger than when I gave you that handjob the other night."

Pete smiled back at her. "Oh yeah! The sight of those big tits has really got me going tonight!" Pete reached out to pull off her lacy white bra, but Jenny pulled back and wagged her finger at him. "Aw, come on, Jenny!"

"Sorry," she said. "Not yet, young man!" Jenny put her hands on Pete's cock again. This time she leaned over and took the head into her mouth. She slowly worked her way down the shaft. She didn't go very far, though. Her gag reflex was strong and she had no intention of changing that.

Pete sunk into the couch as Jenny worked his cock. She paid special attention to how he reacted to various things. He didn't have much of a reaction to licking up and down the shaft, put when she put the head in her mouth and sucked he would moan loudly. Jenny noted that he didn't like having his ass played with, but he started twitching whenever she lightly scratched his balls.

Jenny lifted herself up so that she was looking down on the penis that she was sucking. With only the tip of the cock in her mouth, she was able to press her body up against his so that her breasts were against his waist, cradling his balls. She started to move up and down, sucking one part of him while her breasts rubbed another. Her bra was holding her breasts up, allowing her to push the tops of them a little harder against his balls. Pete's eye's lost focus and he moaned loudly. Jenny scooted to Pete's side and pressed herself up against his legs. She still held his cock with one hand, and she jerked him furiously as he came on the hardwood floors.

"God dammit, that was incredible!" said Pete. "Oh my fucking god, that felt good! Samantha is a decent lay, but she never sucks cock. The only way that could have been better is if you'd swallowed, baby."

Jenny started putting her shirt back on. "Well, that's not going to happen until I'm your girlfriend." Jenny's expression turned coy. "In fact, I may be done for awhile. I'm not sure I can give you another bj while you're dating someone else!"

Pete looked crushed. "OK! I just have to find a good time to tell her, that's all."

Jenny smiled as she wiped up the floor with a paper towel. "Well, if you want to get into my tight little pussy, you'd better hurry. I can go without sex a long time, so you're definitely not going to wait me out."

"OK," said Peter. He zipped up, gave Jenny one last kiss, then left.

About ten minutes later a pretty redheaded girl walked in. "Hey Jenny, how are you?"

"Oh, I'm fine. I've just been reading this boring history book all night. How was the electronics seminar, Samantha?"

"Not bad," said Samantha. "I wish I could get Pete to go to these things with me. I know it isn't his thing, but he could be a little more supportive."

"Yeah," responded Jenny, "boyfriends never do what you want them to."

A week later, Jenny and Pete met at an old well in the woods outside campus. Again, they started kissing as soon as they met.

"Mmm," sighed Jenny, "that feels good. It feels especially good knowing that you belong to me now!"

"Oh, so Samantha told you that I dumped her tonight?"

"Oh yes," said the blonde girl. "She didn't cry, though. I was sure she was going to cry."

Pete pulled Jenny close and smirked at her. His hands cupped her ass as he said, "Wow, what a compassionate roommate you are!"

Jenny pulled out of his embrace and started wandering around, flirtatiously avoiding looking at him. "I'm just her roommate because the school put us in the same room. You loooove her!"

Pete looked away. "Well, I..."

"This is the part where you say, 'No Jenny, I never loved Samantha!' and then tell me how beautiful I am."

Pete took a step towards Jenny and said, "You are so fucking gorgeous!"

Jenny paused for a moment. Then she walked over to Pete, pressed herself up against his body, and kissed him hard. When she was sure she had his attention, she took a step back and started unbuttoning her blouse. As the shirt spread apart Pete smiled wider and wider. The moonlight was bright, but it wasn't until she had actually pulled the shirt off that he could tell she wasn't wearing a bra this time.

"Damn, they're even bigger than I thought they were. Are you sure they haven't grown since last time?"

Jenny smiled, but her smile was a little off. "Uh, actually, they kinda have. I had to go out and buy new bras today. I'm up to a D-cup now. I'm sure they've been growing for awhile and I just didn't notice until yesterday. It is a little odd that it seemed to happen so quickly." Jenny pressed herself up against Pete and took on a little girl voice. "I bet that my breasts getting bigger doesn't bother you at all, does it?"

Pete reached up and grabbed her breasts with both hands. He had a slightly crazy look in his eyes that made Jenny giggle. Plus, the pressure of his hands massaging her chest was making her extremely horny. "Shit, Pete. You must have some kind of special touch, because my tits never felt so good before!"

The boy leaned over and began sucking on her large breasts. Jenny's head rolled back as her eyes closed. For a moment the sensation was incredible, but it quickly grew to maddening. While he licked her nipples, Jenny unbuttoned her pants and began undoing Pete's clothes. He was holding her so tightly that she couldn't get to everything, and his touch felt so good that she couldn't think straight. "Pete, I can't... You have to... oh god! You have to help me."

Pete squeezed Jenny's ass tightly while he sucked on her breasts. She let out little cooing noises as he gently pushed her down onto the beach towel he'd laid out earlier. Pete disengaged and frantically pulled off the rest of their clothes. He laid down next to Jenny and licked his fingers. Then he reached down and inserted his middle finger into her pussy.

"Oh," said Jenny, "not so much, Pete. Just start with one finger, not three!"

"I only have one finger in. Wow, you're really tight!"

Jenny smiled and reached down to his dick. "And you're really... oh my god! You're really big!"

"Yeah, and you're going to love having it in your pussy, aren't you?"

"No, I'm serious. You're bigger than you were last week. This isn't right."

Pete looked annoyed. "Not right? What does that mean?!"

"It means," said Jenny, "that cocks don't grow like this. See, last week when I wrapped my hand around your cock, my thumb overlapped my index finger. Now my thumb doesn't even reach my fingers. I think it's longer, too."

"Look," said the tall boy, "I just lost a sure thing, so I don't want to hear some bizarre excuse to get out of this, all right?!"

"Oh, no Pete! I'm not trying to get out of it or anything, I just... Never mind. I'm really sorry. Just put it in me, please?" Jenny began stroking her new boyfriend's cock. "I was wrong about how long I could hold out. I've been getting hornier and hornier this last week. You make my cunt so wet, and I just want you to fuck me like crazy, OK?"

Pete smiled wide. "Well, since you put it that way, anything you want!" He kissed the buxom blonde girl hard as she stroked his cock. Then he rolled over on top of her. Jenny guided the penis to her wet pussy. The tip touched her lips, but he stopped moving and held his position over her. Jenny started to rub her pussy lips with the tip of the cock, teasing herself while she lubricated him with her juices. When she let out a little sigh, Pete lowered himself further.

"Ow, that's not... Ow!" Jenny tried to guide the cock into her, but it slipped out of her hand. She tried again. "OK, here... GODDAMMIT!!" No matter what the girl tried, she couldn't get it inside of her. She was too tight, and her pussy wasn't stretching to accommodate the large dick.

"Here," said Pete as he rolled them both over so that she was on top. "Try from here, and use your weight to ease in."

Jenny nodded and sat up. She grabbed the cock again and tried to lower herself onto it. The sensation of the cock rubbing against her pussy was driving her insane with desire, but she just couldn't get it inside her.

After a few minutes of frustration, Pete pushed her off of him. "What the hell is wrong with you!"

"She's a backstabbing bitch," said a girl's voice from the forest.

Pete and Jenny both bolted to their feet. The looked around, then focused on a redheaded girl walking out of the woods.

"Samantha!" yelled Jenny. "Uh, um, what..."

"To start with," said Samantha, "I'm going to list off all the ways in which the two of you are idiots." Samantha started walking around the couple. "First of all, you guys don't pay attention to your food. Anybody could slip something into your food. Nanobots, for instance. Nanobots that make changes to you and program your bodies to respond to key phrases. Like 'blowjob position' could be a key phrase."

Upon hearing Samantha's last statement, Pete stood ramrod straight with his legs apart and his hands behind his back. At the same time, Jenny dropped to her knees in front of him, held her hands behind her back like Pete, and sucked his cock into her mouth. Her head began bobbing back and forth slowly as they both realised that they couldn't speak.

"Second, Pete's an idiot because he never listened to me. I tried to tell him about all the cool stuff that I was assisting Dr. Spielgel with, but he never cared. I bet you care about nanobot technology now, don't you Pete!" Samantha noticed Pete's eye's go wide with terror. "Well, here's a brief recap. Right now, both of you are undergoing certain changes. Pete, your cock has gotten bigger. Jenny, the tightness in your slutty little pussy will only last a month, I just wanted to make sure you couldn't do anything with my man. Of course, by then your breasts will be big enough to shake at any strip club and your sex drive will be so strong you'll have to fuck ten guys a day. Also, you've already changed so that you can only orgasm when a guy cums in your mouth."

Jenny let out a small muffled scream around Pete's cock. The vibration made him twitch a little. Samantha smiled at that. "I guess I should explain another thing so that will make sense. I can't make the nanobots reprogram your thoughts. However, I can make them scan for certain things and make physical changes when they detect them. That's why the keyword made you start sucking his cock like a good little whore, it's why you can't orgasm until he feeds you his cum, and it's why he can't cum until I tell him to. That's right, you two could be doing this all night if I don't say the right keyword!"

Jenny licked the head of Pete's dick furiously. She was incredibly horny now, and knowing that she couldn't cum until he did was maddening. She rolled the dick around in her mouth, trying desperately to make him cum despite his programming.

"Third," said Samantha, "You two are idiots because you can't hide squat. Pete can't call out the right name during sex. Jenny tells me she was reading a book all night, yet I find a cum covered napkin in the trash. I suppose the forth way that you're idiots is that Jenny has never emptied the trash once, even when she was dumb enough to put a cum covered napkin in it!!!" Samantha screamed the last part at the lovers, but it didn't affect Jenny's pace as her head bobbed up and down on Pete's cock.

"Well, I guess that's it. Your bodies will continue changing for the next month. My roommate will turn into the greatest slut who ever lived, and my ex-boyfriend will have a huge cock that can't get hard for anyone but me." Pete looked over at Samantha. Mixed in with his expression of incredible sexual frustration was a look of bewilderment. "Oh, that's right, your cock is hard right now, isn't it, Peter? She's just rocking back and forth, sucking you with those tender lips of hers, and you're hard as a rock. 'Noodle,' you jerk."

Jenny's eyes went wide as her only chance for release suddenly went limp between her lips. She sucked the whole dick into her mouth, trying to coax it back to life. She swirled her tongue all over the shrinking cock, but nothing happened.

Samantha smiled and walked over to Pete. She ran her hand lightly across his chest. A look of surprise leaped to his face as his cock sprang back to life. The sudden erection rammed down Jenny's throat.

Jenny was surprised that she didn't gag at all. In fact, having the cock buried deep in her mouth caused her to automatically start trying to milk it with her throat muscles. After a few seconds she pulled out enough to get a breath. Then she dove back in again, this time going deep enough to lick his balls with the dick still in her mouth. Pete moaned, obviously enjoying this greatly.

Samantha took her hand off of the boy's chest, causing his penis to go flaccid again. "See, Jenny? You disgust him and I'm the only girl who turns him on. And this is for the rest of your life, Pete. If you're alone you can jack off fantasising about me, but if there are any other girls around you won't be able to get it up at all unless I'm actually touching you. What do you think of that? 'Speak, boy!'"

"I'm sorry!" yelled Pete, "I'm so sorry! She would do things that you wouldn't do, and you're right, I was an idiot!"

Samantha took a step back, then walked forward and placed a hand on his shoulder. Her touch sent a thrill through him, and Jenny resumed sucking on his large cock as it sprung to life again. Samantha slowly said, "No, I... Pete, you're such an butthole. You're only saying this to..."

"Yes!" Pete pleaded, "I have been an asshole. And... Oh god that feels good... and I was wrong. But, come on, I can't cheat on you now! How many girls in the world can be as sure of loyalty as you can be with me?"

Tears started welling up in Samantha's eyes, but she fought them back. "You can't do this! You're a jerk, and an asshole, and, and..."

Pete closed his eyes hard, trying to concentrate on speaking. Samantha's hand on his shoulder was driving him crazy. When he thought about who was going down on him, he lost some of his arousal. However, whenever he thought about Samantha he felt incredible. The sensations from his penis made him feel like he was going to explode. "Listen, I know 'I can change' is the worst line ever, but it's true this time. I can't go through life fantasizing about you but never touching you. Just give me one more chance, Sam!"

Samantha looked at her ex-boyfriend, then looked at her roommate. With tears flowing down her face, she said 'Kaboom!' and Pete shot a huge load into Jenny's mouth. Pete moaned loudly and shot load after load for the blonde girl to swallow. Jenny didn't just orgasm when he came in her mouth, she continuously orgasmed, cumming hard until Pete ran out. When he was done Samantha said, 'Sit, bitch!' Then she and Pete fell into each other's arms while Jenny was unable to move.

While kissing, Pete and Samantha both rushed to pull her clothes off. They laid down on the beach towel, just inches away from where Jenny was still kneeling. Pete stroked Samantha's red hair. He lifted himself up so that he could guide his large cock inside of her.

"Oh!" cried Samantha, "that feels so good. I love your huge cock, Pete! I can change it back if you want me to, but... Oooo!"

Pete smiled down at her. "Nah, leave it. I enjoy seeing you go cross-eyed!" Pete placed both hands on the ground to steady himself. Despite the huge orgasm he'd just had, contact with Samantha was working him up again quickly. He'd never felt this attracted to a woman before. It was an incredible feeling.

Pete increased the speed of his stroke, and Samantha moved her hips to help him. She hadn't mentioned this, but she had also programmed his body to become more muscular. After another month he'd be a Greek god, but he was already better cut than she'd ever seen him. She had thought the revenge would be better if he was so hot that girls he couldn't please sexually were constantly attracted to him. Now she was just marvelling at how good his tight, muscular body looked in the moonlight.

Pete started seeing signs that Samantha was about to cum, so he slowed down. This was the most powerful sex he had ever experienced, and he didn't want it to end too quickly. With a slower pace, he was able to lean in and kiss Samantha some more. She tasted wonderful.

Jenny could move her eyes, but not her head, so she wasn't able to turn and look at the couple making love beside her. However, the sounds were getting her aroused again. She tried to reach for her pussy, but couldn't make her hands move. After a moment, she gave up in frustration and tried to block out the loud moans.

Samantha rolled herself and Pete over. "I think after all this, I deserve to be on top!" Both of them smiled, and the redhead sat up. She continued stroking slowly as Pete reached up and massaged her breasts. She placed her hands on his. Even though her breasts were small, they were very perky and Pete had always loved the shape of them when she was aroused.

Jenny heard the couple increase their pace. They both moaned loudly, and they both yelled out that it was the best sex they'd ever had. Jenny began fantasising that she was the one sliding up and down on Pete's big cock. She could almost see herself riding him, shining in the moonlight as the sweat glistened all over her body. Jenny pretended that Samantha's moans were her own, and when she heard Samantha scream and cum she tried to force herself over the edge too, but couldn't. Then she heard Samantha yell 'Kaboom!' again and Pete's screams filled her ears.

Samantha laid down on Pete. She felt more relaxed than she had in weeks. They kissed tenderly.

Pete pulled out of the kiss. "I'll be a better boyfriend this time, I promise!

"You'd better!" said Samantha. "I've programmed a few other things into your body. Not just keywords, so don't try anything tricky!"

"No problem!" Pete smiled broadly and looked over at Jenny. "So, are you really making her into the world's biggest slut?"

Samantha thought for a moment. "Well, I don't know. I'm still pretty mad. I've already started the paperwork to move to a different dorm room so I don't have to see her anymore." Samantha got up and walked in front of Jenny, who was still kneeling on the grass. "I'll give you a choice, Jenny. I can leave the programming you have now so that you turn into the super slut, or I can give you new programming. The new programming will make your sex drive and body normal again. However, I don't want you doing this to someone else's boyfriend, so I'm also going to make you a little bit fat. And I'll make your lips really thin and your hair will be so fragile you can't bleach it anymore. Maybe a skin thing so you can't wear make up, either."

Jenny looked up, horrified. She looked over to Pete, but locking eyes with him just caused him to get a slightly nauseated expression until he looked away.

"So," said Samantha, "what will it be, Jenny? Life as a nymphomaniac with huge breasts who can only orgasm when a guy cums in her mouth, or normal girl who's just unattractive. 'Speak, bitch.'"

Jenny felt her throat relax and knew she could speak again. She sat silently for a minute, then two minutes. As Samantha was about to say something, Jenny gave them her answer.

Two months later, Jenny was sure she'd made the right decision. She'd had to leave college because she didn't have time anymore, but that was fine. She was enjoying herself a lot now.

Jenny lowered herself onto a cock, guiding her pussy onto it with practiced ease. She reached out with both hands and grabbed a cock on either side of her. Then she slid a fourth cock into her mouth, leaning forward so that she could cradle the man's balls in her huge breasts.. She was very excited about the possibility of getting all four of these guys to cum in her at once.