They turn into what they want to be

Blake found it difficult to concentrate on anything but the continued flow of waste from her nether regions--how was it even possible for one person to produce this much?--but it did catch her attention when another woman's voice came from the corner of the room both she and Evelyn were facing.

"It's all right, Gen. I'll take care of that part. I know you'd rather be on the receiving end yourself, anyway."

Blake felt her brain break a little as the body matching the voice somehow faded into her sight, as if there'd been an invisible person in the room all along.

"Thank you, Mel," Professor Genevieve said. "I don't mind playing the stern maternal figure but ultimately I'm just jealous that you're going to be punishing them before you punish me."

"What have you done to warrant punishment?" the other woman, Mel, asked.

"You should be punishing me on general principle. After all, that is what..." The words became largely unintelligible to Blake but she was pretty sure she caught "genie" and "sex" in there.

She tried to focus on Mel again. The woman seemed familiar... ah. Blake placed her. Melody. Professor Genevieve had introduced her as the main TA for the course on the first day, after addressing all the other standard administrative matters which Blake and Evelyn always ignored, and then had just moved on with the lecture. Blake regretted not having paid further attention then, because she would definitely have tried to get into Melody's panties if getting under Professor Genevieve's skirt failed.

Even aside from that, Blake would have wanted to get Melody sandwiched between her and Evelyn just on general principle. Melody was tall, muscular, and chesty in a way that said "I got blessed by the boob fairy" without implying that the boob fairy accidentally spilled too much growth potion on her, the way Professor Genevieve looked. Not that Blake minded seeing tits as large as the professor's, of course, but there was something nice about snuggling with a woman who was busty and it would probably be harder in certain ways to do that with someone as curvy as the professor than with someone who just had ordinarily large breasts.

She wondered where Melody shopped for her clothes, and got her hair done, for that matter. Even with all the new hair colours Blake saw around, while she had seen a few people with white hair, she hadn't seen anyone who had a rainbow on the underside, never mind one where the colours seemed to be moving. As for her clothes, Blake was just busty enough to know that it was hard to find racy lingerie for anyone with breasts as large as hers, never mind what Melody sported, but somehow Melody had found such a bra, the sort of thing Evelyn often liked to wear, because she could just buy that sort of stuff off the shelf, only in a much larger size. And similarly from shopping with Evelyn she knew that finding sexy panties to fit around an ass as magnificent as hers was often an exercise in futility, while Blake could find stuff for herself quite easily, and she was pretty sure that Melody's butt was more on the Evelyn side of things.

Blake realized with a bit of a start that the two had kept talking for a bit, and she tried to focus on them again even though the rate of her urination and defecation had only been increasing. Still, she couldn't really make out what was being said; all she caught before Melody turned to address her and Evelyn were the phrases "wish", "neither death nor significant harm", and "result from sexual activity".

"You know," said Melody, "I really, really hate bitches like you."

"You don't even know us!" Evelyn pointed out around her gasps. It came out funny because her face was scrunched up against the horrendous odours coming from her bodily waste, and Blake's. Somehow neither Melody nor Professor Genevieve were affected, though.

"No, but I know your type. Hot bitches who use their bodies to get everywhere in life. Good grades now, after you graduate you'll eat out a hiring manager and then suck off your boss for the next forty years because it's all you'll know how to do. You won't have any other skills but you're too proud to admit that you're just glorified prostitutes."

"We can develop other skills!" Blake objected.

"Oh yeah? Like what?" Melody challenged.

"Blake could be a dietitian!" Evelyn said. "She gave me a good diet, after all."

"Oh, yes, a good diet to give you exactly the right sort of farts to satisfy her fart fetish without unduly disturbing everyone else. Not proper nutrition, not dealing with actual medical conditions, just so she can indulge her own kinks. Sure, she'd do wonderfully as a fucking dietitian, I'm sure. And what skills do you have besides flaunting your rear, Miss Fatass?"

Neither Evelyn nor Blake could provide an answer to that.

"That's what I thought. Now, what shall I do with the two of you."

While Melody was silent, Blake tried to crane her neck around to see if the shit behind her was piled as high as what Evelyn had ejected, which was already in a pile larger than she was. From what she could glimpse, her own wasn't much smaller, and both were still growing. Somehow. Maybe that whole "genie" thing had something to do with it.

"Well, for starters, I think that's enough crap for now," Melody said, and Blake felt the flow taper off and end. She was about to breathe a sigh of relief, even with the air being as rank as it was, but instead Melody flicked a finger at her and Blake found herself flying backward into the huge brown lump, her body getting completely buried in the stuff, which collapsed around her, leaving only her face sticking out--and even then she could feel clumps of the stuff on it. She could see that Evelyn was in the same situation.

"And I mustn't neglect the other mess you made." Blake was about to take umbrage at that, given that she was pretty sure Melody was the cause of their prodigious production, only to find herself flying forward, still coated in shit, to land face-down in the puddle of piss she'd made. She tried to get up only to discover that something was holding her in place. At least her nose and mouth were turned just far enough away from her urine that she could breathe easily.

"I could've been like the two of you, you know. Could've screwed my way through university, sucked my boss's dick for a living, posted nudes on the internet as a side gig. But I didn't do that. I applied myself to my studies and I had some decent job offers lined up. Then I got a big trust fund and I've been able to sit in my apartment and finger myself to smut all day long for the last few years, but the point is that I put in the work and would've succeeded on my own merits. You two would only succeed so long as you could get your tongues deep into another woman's twat."

"And that warrants doing this?" Evelyn asked. "What's the point?"

"The point is that I can and I want to. You were just going to whore yourselves out for a living while deluding yourself into thinking it was all a choice. I'm just stripping the illusion away."

Blake flinched as she heard the office door open, but the person who stepped in was just--another Melody?

The two identical women tore off each other's bras and panties, embraced, and began kissing and rubbing their nipples together while fingering each other's cunts.

"I swear, you have not masturbated properly until you've done it together with your second body," Melody said. Blake wasn't sure how Melody got a second body in the first place, but given that each of the two women did appear to feel not only what was being done to her own body but also to the other's, she figured that what she was witnessing was in fact masturbation and that she was looking at a single person who somehow had two bodies.

"Now, let's see..." Melody trailed off as her bodies separated, each one walking toward one of the prone couple. Blake caught Professor Genevieve crooking a finger, and she suddenly felt compelled to bring herself to a kneeling position. Melody was tall enough that it left both Evelyn and herself roughly level with her crotch. Blake felt just the slightest glimmer of hope. Maybe she'd get to eat Melody out! That would at least be one bright spot from this nightmare.

Blake was just about to ready herself to do that when Melody said, "Mouths wide open, tongues inside." Blake found herself unable to disobey, and moments later she gagged as Melody began pissing right into her mouth.

It wasn't that Blake had any particular objection to toilet kinks. She knew people had them and she admitted to herself that if Evelyn had ever sharted on her, she wouldn't have complained about the shart itself, just about the potential medical complications. Hell, if it weren't for those, she might well have let a guy piss in her! But she abruptly found herself reconsidering that position, because Melody's urine was vile. It made Blake want to run to her dorm room and scrub her mouth out for half an hour just to try to get rid of the taste, and then probably go buy a new toothbrush to keep going. It was horrible, and she couldn't do anything but swallow it as best she could. Her eyes began to water from the effort.

Blake lost track of time, but eventually Melody said, "I hope you hated that. You'll hate this even more. And no, I'm not going to indulge your fucking fart fetish." Blake abruptly found her face wedged between a pair of large ass cheeks, though they weren't as delightfully large as Evelyn's, and they were a lot harder and not as comfortable besides. Her mouth was wedged up directly against Melody's anus, and she tried futilely to shake it just before she felt a log of the worst thing she'd ever tasted hit her tongue.

Blake wailed in misery, the sound muffled by the mass in her mouth, and she could just barely make out Evelyn doing the same. Log after log of what she knew could only be feces pushed out of Melody's butt and into her mouth, the sadistic woman seemingly quivering in orgasm at the torment she was inflicting on the two.

Blake couldn't believe that this was just the result of a disdain for how she'd chosen to try to get ahead in life. Melody had no personal reason to dislike them, either, for that matter. It was as if she and Evelyn were just test subjects for something. Blake couldn't imagine what that something might be, but she felt no small amount of pity for anyone else Melody chose to inflict herself on.

She thought she heard a few scattered phrases like "no dick yet", "author", and "trying to avoid", but it was difficult to focus on anything when she was desperately trying to swallow each humiliating piece of crap as it forced its way down her throat.

Finally Melody stepped away and Blake simply went limp, collapsing to the ground, Evelyn doing the same.

"Oh, stand up. Let me get a good look at your filthy bodies," Melody ordered, and Blake found the command irresistible.

"If nothing else, Mel," Professor Genevieve said, "you should at least clean them off if you want them to actually fulfill their new purpose."

"I guess you're right," Melody agreed, and Blake stamped down on the new spark of hope she felt at feeling all of her own bodily waste products vanish from her. It took her a moment to realize that their stench still lingered.

"I hope you found that as thoroughly abhorrent as I find the two of you," Melody said.

Blake's will was broken. She'd do anything just to avoid whatever other tortures Melody might want to put her through. She couldn't muster up the energy to object to being told she was "abhorrent", so she only nodded in acquiescence, and saw Evelyn doing the same, with much the same expression.

"Since the two of you want to be sluts so badly, I figure I might as well help you along with that." The woman nodded at Professor Genevieve, who snapped her fingers. Mirrors popped into existence, letting Blake see her body from every angle.

Her eyes went wide as letters faded into existence on her skin, one above her pussy, the other above her ass. Both of them said "FREE USE".

Blake's brain broke again. She liked sex, sure, loved it, even. But it was always her choice! She chose to have sex every day! She was picky about her partners but it was because she could be picky, so many people wanted to fuck her. But now she knew, somehow, as surely as she knew any other immutable fact, that she no longer had a choice in the matter. Her body was free use. Anyone could just fuck her and discard her like a used rag. She wasn't a person any more; she was just a cumdump.

"And since you liked my gifts so much"--the expression on Melody's face told Blake that the woman knew full well that both of them had hated it, and that that was in fact the point--"I figure you should get to experience that again, too." This time it was words appearing above her bust, along with an arrow pointing upward: "PUBLIC TOILET". Evelyn, of course, was given the same treatment.

Blake wasn't just a jizzrag; she was also a place for people to void their bladder and bowels. She wanted to break down and whimper.

"Of course, nobody should want to be around two worthless sluts like you very much, so I'm also making you incontinent. It'll stop just long enough for you to be fucked. I'm sure you'll get used to it eventually."

Tears formed in Blake's eyes as she once again felt piss dribble from her urethra and small bits of shit drop from her butt. No matter how much she tried to clench her sphincters, she couldn't stop it.

"Oh, and why not. Not everyone wants a pussy or an ass, after all." Blake felt her crotch shifting, a nub growing above her slit that swiftly turned into a cock large enough that she could easily see it over the swell of her breasts, without needing to look in the mirror. Evelyn could clearly see hers even more easily. It, too, started dripping pee.

"You know those aren't the only fluids the body produces, Mel," Professor Genevieve put in. "And you know Blake's been jealous of how much bustier everyone is on campus now."

Blake couldn't make out Mel's reply to that, only catching the phrase "making them", but she was quickly distracted by the sight of her bust growing. Evelyn's did as well, hers not stopping until they were as big as Professor Genevieve's, while Blake's somehow got even larger, and then her eyes widened as she felt them move up and apart, four more titanic boobs crowding her chest with six in all, in two rows of three.

"I'm sure you'll get plenty of interest in those, and you should probably cultivate that. After all, if you don't, you'll get pretty uncomfortable with all the milk you'll be producing. Don't try selling it or anything, though, it won't last long outside a body, just go right back inside you, you'll have to get people drinking straight from the source."

Blake's confusion was mirrored on Evelyn's face, and Melody continued. "Oh, yes, I know how much you like to cuddle with your sexual partners. Part of your foreplay and your aftercare. Well, I hope you like feeling mouths on your nipples because that's the closest you're ever gonna get again. Nobody's going to want to cuddle with anyone as rank as the two of you, not even the avowed scent fetishists. Because no matter how much you try to clean yourselves, you'll never get rid of the stench of wallowing in your own shit--never mind what everyone else is going to do to you. People won't notice it as long as they're using you, of course, but they'll get away as fast as possible once they're done."

Melody's second body somehow just vanished, and her lingerie reappeared. "Don't worry about eating or drinking or anything like that. Your bodies can extract all the nutrients they need from what everyone's going to use you for." And with that, the professor and the TA disappeared, the mirrors going with them.

Blake turned to Evelyn as soon as she could move again. The stricken look on her friend's face matched the one she knew was on her own.

They took two steps toward each other before the smell became too vile and they had to separate, the tolerable distance they found themselves having to maintain only just barely allowing them to brush their fingertips against each other. Their breasts were just small enough that they couldn't rub their nipples together, but too awkwardly large for them to get their fingers onto their nipples.

No more hugs. No more cuddling. No more resting her head in Evelyn's ass. No more holding her best friend's hand.

Just sex and shit for the rest of her life.

Blake still wasn't sure what she'd done to deserve what had become of her. All she could do was break down and cry at the unfairness of whatever had given such a horrible person the power to do what had been done.