***This is not my story; I simply cleaned up the grammar and added a bit more sexytimes at the end. Go check out Lord Aimnor for the original***


After weeks of working, Brittney finished her project. What she needed now was a test subject, but not herself. She had no idea what this substance would do to a person. One of her classmates would be suitable, however. Kelly was the first person she thought of. After her last lecture for the day was finished, Brittney searched for Kelly in the hall of the gym. 

“Hi Kelly I have a favour to ask you," Kelly looked over her shoulder; her hair covered her face and she looked very sexy. Brittney was a closet lesbian, and frequently had erotic fantasies about Kelly, but had never made a move.

“Can you let me know what today's lecture was all about? I sort of fell asleep," This wasn't entirely a lie, as Brittney did nod off halfway through. As Kelly was explaining, Brittney switched her soap with the bottle that held her test solution.

After all was done they both made their way into the main building. They entered the locker room, dropped their clothes off, and opened the door to the shower. Kelly put the soap on the bar in front of her. "What will happen to her?" Brittney wondered.

Brittney took the shower stall behind her for a better view of the event. Kelly had a pretty nice body, perfect long legs, perfect skin, long brown hair, and a face all the girls at school were jealous of her for, but only a pair of AA-cup boobs, not more than just handfuls.

Kelly opened the bottle and sniffed. It smelled like honey, not the strawberries that her soap usually smelled of. "This isn't mine, but it does smell good," She thought one of the other girls had made a mistake. She looked around; just Brittney and she were in the shower room. Brittney giggled quietly and turned around for a better view of what would happen next. Kelly began to lather herself with the soap. 

When she was completely covered she began to feel an effect. Kelly's body began to feel odd: it tingled, especially around her chest. Then her breasts began to grow suddenly. “What the hell?” She covered her tits, but other than that, she didn‘t know what to do. "This has to be a bad dream," Her ballooning boobs pushed her hands apart and gave Brittney a beautiful view of the growing spheres. Kelly tried to squeeze then together in the hope that it would stop the growth, but it only served to accentuate her growing cleavage. Brittney, watching all this, found her nipples began to harden as she observed her neighbor's struggles. Likewise, Kelly noticed a growing wetness between her legs as she continued to grope her swelling tits. Evidently, a side effect of the growth was vastly increased sensitivity in her bust, especially in the nipples. Finally, the growth leveled off, and she sported a pair of volleyball-sized tits. The entire process took less than 5 minutes. 

"Did you really think rubbing them would stop it?" Kelly turned around. 

"Did you …" She looked into Brittney‘s face, she was wearing a demonic smile. 

"Yes. It was me who gave you the bottle." Kelly was shocked to hear this. "I‘m really grateful that you could help me so well for my study," Kelly felt Brittney's soft touch on her back. "I didn‘t really know what would happen, so I decided to take someone out of our class. So I chose you. If I knew that it makes tits bigger, I would have taken it myself. But you look so beautiful with them."

Kelly began to get angry. "Do you think this is funny? Look at me! I'm not beautiful; I look like a big titted freak!" She shoved Brittney up against the wall, but to her surprise, Brittney grabbed her tits and started rubbing. Unable to help herself, Kelly let out a gasp. "Ohhhh," she moaned, lost in pleasure. 

"Looks like your sensitivity's increased," observed Brittney. "It's making you moan for sex like a little slut,"

Kelly summoned up the willpower to take a step back. "I am not a slut!" she said, though the touches of the other girl's fingertips had felt fantastic. About to let Britney know exactly what she thought of her, she realized that the tingling had returned. Brittney smiled, and held up the soap bottle from before, then tossed it aside. "Please...no," Kelly thought as she frantically rinsed under her showerhead to clean her breasts off. But she was too late; her tits had absorbed all of the creamy white soap. "Oh god please don‘t grow a second time,"

Then Brittney began to laugh. "Don't worry, they won't grow anymore," But just as Kelly began to breathe a sigh of relief, Brittney added, "Look at your nipples," Sure enough, they were darkening and growing larger. The areolae around them were also darkening and growing in diameter. Then on the tips of both her nipples, two delicate white drops appeared.

"What's going on?" Kelly pleaded. A white liquid began to drip onto the floor.

"You don‘t know what this is, my beauty?" Brittney giggled. 

All Kelly could scream was "MIlK!" 

As if in response, milk shot like streams from a water pistol out of her nipples. Kelly's scream turned from one of terror to one of pleasure, as she orgasmed from the feeling of the white liquid leaving her breasts. Milk sprayed everywhere, even ending up on the ceiling. Brittney began to laugh, and then received a spray of milk directly in the face. Licking her lips she said to the other girl, "Mmmm! Delicious! I was wrong before, you aren't a slut, are you? No, you're a cow. My little milk cow," 

She was so distracted from the delightful flavour of the milk and taunting Kelly, that when something hit her bare chest, she didn't immediately investigate, assuming it was simply another wave of milk. It wasn't until a faint aroma of honey hit her nose, and the affected area began to tingle did she look down. A white fluid, similar to milk on first glance but much thicker completely covered her chest. It sort of resembled cum, actually. Glancing up at Kelly, Brittney saw that the orgasming girl on the floor had managed to grab hold of the special soap bottle and squirt the rest of its contents onto her chest. 

"Oh god please no..." Brittney said. Kelly managed to sit up; her breasts were no longer shooting milk quite so forcefully. Two small streams of milk still came from her nipples, however. 

Brittney frantically tried to remove the white soap from her small chest, but there was too much of it, and her efforts only rubbed it in further. Normally, Brittney would have welcomed a larger bustline, but there was much more soap on her chest than Kelly had dosed herself with, and she didn't want breasts any larger than the volleyballs the other girl was sporting. 

Brittney's nipples, already hard from watching Kelly's tits grow and shoot milk, grew even harder, if that was possible. Then the tingling grew even greater, and her small tits began to push outwards from her body, the soft wet skin stretching in an erotic fashion. Unlike Kelly's, her tits did not stop at the size of volleyballs. Instead, the behemoths that stuck outwards from Brittney's chest looked to be more in the size range of watermelons. Stubby nipples that were surrounded by areolae the size of CDs capped the tremendous tits that Brittney now sported.

Brittney began to cry.  "You did this to me, you bitch!" she screamed at Kelly, who was standing in front of her with an expression of awe on her face. That expression turned to amusement as she watched Brittney's rage.

"I'm afraid you've done this to yourself, my dear," she said. "Though allow me to say how beautiful you look with those splendid tits of yours,"

Brittney twisted her face with anger, but before she could do anything, her nipples subtly grew darker and slightly larger. Then the lactation began, very much similar to Kelly's from minutes earlier, but much larger in both size of the spray and volume.

By the time the first orgasm hit Brittney, she was no longer feeling so angry at the other girl. When the second orgasm arrived, Brittney was actually feeling like she ought to thank Kelly. By the third, fourth, and fifth, the method by which she wanted to thank the other girl wouldn't be out of place in a porno.

Kelly watched as Brittney hit her sixth orgasm, and then came herself from furiously rubbing her pussy. It seemed like the other girl had calmed down, and the milk coming from her nipples was now in the form of two small streams, rather than the torrent it had been earlier. Not that she'd minded the torrent, of course. Like Brittney herself had said, the milk was delicious. 

Kelly got down on all fours, shivering with pleasure as her nipples hit the cold tile. She drew close to the other girl, who was just coming down from her sex-crazed reverie. 

"Wanna fuck?" asked Brittney, whose bustline now eclipsed Kelly's own.

"I thought you'd never ask," Kelly replied, and lept into her arms, kissing passionately. The kiss went on for what seemed like forever, their arms roaming about each other's bodies, squeezing boobs, tweaking nipples, massaging wonderfully curvaceous asses. 

Kelly was the first to break the kiss, then grinded up against her lover's body, pressing their nipples together.  This sparked another round of orgasms as they were wrapped in each other's arms. Kelly started to moan, but then was cut off as Brittney maneuvered her nipple into her mouth. Kelly needed no prompting, and immediately began to suck hungrily on her tit, the warm, creamy milk filling her with warmth and pleasure. This pleasure was nothing compared to what Brittney felt; she had lost count of her orgasms. By now, milk had started to spray out of her other breast as well, drenching both girls and adding to the large white puddle on the shower room floor. 

Brittney finally pulled her nipple out of Kelly's hungry mouth. The other girl immediately started to pout, adding to the cuteness of her round face. "Not to worry, my dear," Brittney reassured. "I simply want to share the love," And with that she latched onto one of Kelly's tits, greedily drinking up her creamy bounty. Kelly let out a moan, a moan that doubled in strength when the two toppled over onto the cold tile of the shower room floor. 

Much later, when they had explored each other's bodies thoroughly, they decided to leave the locker room and enjoy their bodies somewhere else. They pulled on their clothes, both giggling as they compared the size of their shirts from earlier to their massive bustline now. They eventually settled on towels that made them look like they were each smuggling watermelons, but at least they were decent. But when they reached the door to exit, they found that it wouldn't open. They must have gotten locked in when the gym closed for the night.

"At least we won't be thirsty," purred Kelly as she untied Brittney's towel and started drinking her fill once more...