"Do I still have a vagina?" Rachel asked shyly. "And a womb? What if I have children?" Not that she was sure she wanted children, but she needed to know.
"Yes, and yes," Nurse Andrews said. "Your vagina is new, but you still have your human womb. However, you'll need our help if you ever want to conceive. It won't happen by accident."
There was a sensitive spot at the base of the slit. Rachel blushed as she asked, "Why does it feel like I'm touching my, er, my asshole?"
Nurse Andrews chuckled. "Because it is your asshole, honey. But don't worry, nothing much will be coming out of there. Now, enough talk. Get out there and swim. Learn to use your new body the way God intended."
Rachel had a whole swimming pool to herself, maybe five metres deep and twenty across either way. She eased off the inclined bed, but clung to it for security. "In many ways," Nurse Andrews said, "your lower body is a separate organism. It has gills to breathe, a heart to circulate the blood and oxygen, and enough intelligence to translate your human impulses into natural movements. It can survive a short time out of the water by borrowing oxygen from your upper body, but also it will lend oxygen to your upper body if you are unable to breathe. Go - try it!"
Taking a deep breath, Rachel dared to let go, and the weight of her body pulled her down - and was distracted from her momentary panic by just how well she could see under the water. They must have done something to her eyes as well.
She tried to swim, using her hands mostly at first, but gradually discovering how to use her legs - or what replaced her legs now. Her lower body was incredibly powerful when used right, able to propel her rapidly through the water. Indeed, the pool, which had seemed large to begin with, soon felt very confining.
Contrary to her fears, her large breasts didn't slow her down significantly, and in fact the way the water brushed her nipples was not unpleasant. Not at all.
She surfaced at last, coming up for air, not that she needed it particularly. Nurse Andrews smiled at her. "Looks like you're almost ready. Go, enjoy your swim, and tomorrow we'll take you to your new home."
*
Her new home - and this seemed like altogether too much of a coincidence - was the zoo she had been working at. It had the world's largest inland tropical aquarium. Twenty metres deep, and at least a hundred across, it had coral reefs, sunken ships, and everything, and was often used by the big studios for underwater shots. There were also plenty of reinforced windows to let the scientists monitor - and the visitors gawp at - all the pretty fish.
And the new star attraction: a mermaid. Half fish, half big-breasted naked woman, with nowhere to hide. And even if there were corners where she could hide for a while, she couldn't stay there forever. She needed to breathe occasionally, and she needed to eat and drink. (In fact, she could drink the salt water, but it mostly went straight through her, and it was weird trying to swim and pee at the same time.)
There was an island in the middle of the aquarium with a freshwater spring, where she could lie half-in half-out of the water and sleep. It was little more than a rock, really, but had a concealed machine that dispensed what looked like balls of mozzarella cheese but tasted more like coconut.
It took her a few days to get used to being watched almost constantly, mostly by kids just excited to see a mermaid and ecstatic whenever she waved back, but there were also the adults, especially men, whose expressions of lust spoke of dark desires. Sometimes she saw them touching themselves too. It was very creepy.
She tried to ignore them, taking her lonely pleasure instead in swimming through the corals and studying the fish. There were far worse fates than being a mermaid.
Rachel was there a week before she learned the final secret of her transformation. It affected her the way blood affects a shark, a single drop in the water luring her across a great distance, stirring a powerful hunger in her that sharpened her nipples and set her clit to throbbing madly.
It was nighttime, so late that even most of the staff had left. She followed the scent through the water to where a man stood at the aquarium's edge. It was the zoo's owner, Henri Duchamp, a billionaire by all accounts. She had glimpsed him from afar once, and in the news often enough.
His cock, semi-erect, jutted out from the fly of his tailored suit, and as she watched, a drop of cum fell from its tip into the water. The smell of it was intoxicating. That was what had called her to him. "No!" she cried, and made to swim away, but the lure was too strong and she circled back quickly.
Henri had removed his suit and underwear, and now sat at the edge of the water in only his shirt. He was not a handsome man, although the aura of wealth and power and confidence was undeniably seductive. "Come, girl," he said. "There's no point fighting it."
Rachel knew it was wrong, but couldn't resist. She swam gradually closer, towards the edge, until her arms were on his legs, her nose against his cock that was hard again. The part of her mind that wanted to reject this manipulation of her lost out to the simple hunger to taste the cock and make it cum again.
Although a virgin, she had given a past boyfriend a blowjob on one occasion, but his cock had been nothing compared to this one. She barely managed to wrap her lips about the soft, bulbous head. Shifting position slightly, she succeeded in wrapping a hand about the shaft, and worked it steadily as she sucked on the head of the cock and used her tongue to explore it.
Her boyfriend hadn't lasted long when she did it, and Rachel had been angry when she tasted his cum in her mouth, but this time she wanted it all, and Henri seemed in no hurry to finish. He had come once already, of course. She kept at it with determination, however, sucking and licking with enthusiasm, and stroking the shaft. Right then and there, all that mattered was making him come.
And when at last he did, the thick shaft jerking wildly between her lips, cum flooding into her mouth, she swallowed as much as she could, a little disappointed to feel so much running down her chin.
When he eased her off him, his cock diminishing rapidly this time, she was reluctant to let him go. Henri might have come twice, but Rachel hadn't even come once, and couldn't remember ever needing it so badly. "What about me?" she pleaded.
Henri blew her a kiss. "Tomorrow, sweet one," he said, and strolled off, his clothes draped elegantly over his arm.
With a loud moan of frustration, Rachel swam off, back to her island, and in what little privacy it provided she used her fingers to fully explore her mermaid pussy for the first ever time, until her cries of ecstasy echoed across the water.
*
As her body's feverish need cooled, however, her post-orgasmic bliss gave way to a sense of betrayal, and she oscillated between rage at everyone who had played their part in the drama that led her to this point, and a black depression that robbed her of the will to eat or swim or anything. Because no way was it coincidence that within days of starting work at the zoo, she was instead both the prize exhibit and a sex toy for its billionaire owner.
And if so, were they all in on it? From the married man who seduced her, to the lawyer who played on her fears, to the nurse who smiled so kindly. All to turn a naive virgin into a sluttish fantasy. They had threatened her with a life of whoredom, and turned her into a helpless cum-loving trophy.
In the morning, thirst and boredom stirred her to life again, and for a while she swam listlessly, ignoring the crowds of watchers. Warring with both her anger and depression was the memory of just how much she had enjoyed that encounter, and a secret hope it would happen again - as much for the brief moment of company as the intoxication of cum.
Against all her better judgement, she was there waiting for him this time, the aquarium quiet once again. "When did you decide?" she asked him. "When was the moment you decided I should be your exhibit?"
He laughed gently. "We were looking for someone young with no family, blonde and good-looking, good with animals. And then you applied, and we checked to see what you were like, what experience you had." Clearly he didn't mean work experience. "So we gave you a job, studied you for a few days, and I certainly found you attractive. So we set things in motion - and you played along very nicely."
Which was true - she had. "I get the mermaid thing," she said. "But why these?" She lifted her breasts. "And why do I have such a craving for cum?"
"Because all my life I've wanted my very own mermaid. I've even tried dressing women in costumes, but nothing compares to the real thing." He shrugged. "Plus I love big breasts - who doesn't? - and I don't have the time and enthusiasm for seduction."
As if to prove the point, he stripped as he spoke, his cock already semi-erect and hardening swiftly. Rachel was torn between an angry desire to tell him to go to hell, and a raw hunger for a repeat of the previous night. As she hesitated at a safe distance, Henri sat at the edge stroking his cock with an amused expression - and she understood: she might resist now, but at the first hint of cum in the water, she'd be back, begging for it.