His New Girl

slut had almost forgotten she used to be a man, and she gloried in that fact. Of course, she wasn't all the way there yet--and that was how her Master liked her.
slut's chastity belt was a customized steel affair, firm, secure, waist-slimming, sinister. It was her joy, and the bane of her existence. The vibrating plug locked inside her kept her reminded that she hadn't had an orgasm in quite some time--and that was also how her Master liked her.
She knew she was getting smaller and smaller down there, and it pleased her. Master explained to her that the longer she went without coming, the closer she would get to being a real woman. She was to use all that sexual energy to devote her entire being to becoming a woman and serving her Master in every way.
slut contemplated this as she gently nibbled her Master's cock. Her long hair was fine and silky, her breasts firm and lovely, her waist trim, her hips well-formed. In fact, unless the chastity belt came off, she would pass an inspection--and often did. To many that Master had introduced her to, slut was a chaste, utterly submissive woman, and that delighted her.
Suddenly, in response to her mind wandering, she became frantically aroused and totally focused. Since the task at hand was giving her Master pleasure, she went to it with enthusiasm, eliciting a shuddering moan from the wonderful man who had made her a woman at last. She hoped that she was close! She wanted to come so badly, it made her want to climb the walls and throw cars. And it made her want to know, at last, what it would truly be like to be fucked like a woman after all this time and effort!
Master exploded in slut's mouth, and it was like liquid happiness. She was still licking her lips when Master blindfolded and gagged her, leading her towards the bedroom to be strapped into her sleepsack for the night.
Lying awake, Master stroked his sleeping slave's bound body. It really was a beautiful body, and he was proud. He smiled wickedly in the darkness, almost laughing at what his poor little slave didn't know.
Creating a 'compartment self' in slut's mind, he had taken her to counseling, keeping all such affairs in the hands of the 'other.' slut had no idea. And she also had no idea that she had already gone through the surgery that made the changes she'd been waiting for.
Master did laugh then, but silently. And slut had no idea that he'd expanded that 'compartment' quite a bit--or that slut's new 'self' enjoyed regular orgasms and wild sex on a daily basis.
For all slut knew, she was still at the crossroads, waiting for that critical mass of arousal and submission that would grant her wish...
And her Master had been quite thorough in his work. She would never feel entirely complete in her transformation, and would never know the truth. She was completely addicted to chastity, and there was no way she could come without permission--which her Master would never, ever give (though he never told her that). She would always struggle to stay locked up, strive not to see what was down there behind the belt, and even if shown what was there, would not believe it.
slut was so utterly owned that enslavement would probably no longer be the proper term. There wasn't a thought in her head that didn't revolve around her Master, his pleasure, or what he did to her. There wasn't a moment in which she wasn't reminded of his absolute dominance of her very mind. Unless it was one of these moments.
"Wake up, fucktoy," came her Master's voice, and slut squirmed in her nylon sack as her rampaging horniness crossed over to her 'other self'. In moments, the zippers came undone, and everything but her collar, corset, blindfold, and gag was removed. In darkness and silence, she awaited the key, which was applied shortly. Once the chastity belt was off, slut was almost demanding in the way she pressed herself against her Master. Rubbing her cheeks against his, inhaling deeply at his neck, moaning as her hands roamed over him, she rubbed her clit against his cock and slowly worked her way onto it. Her lips were clamped tightly against the gag, her fingers twisting and pulling her nipples as she came again and again over the course of the next few minutes. Then she felt his hands on her, forcing her into a new position, and then he was behind her as she rested on her hands and knees, one hand holding her hair and the other on her shoulder, forcing himself as deeply as possible into her aching wetness.
After he'd come again, he put her back into the nylon bag that was her nightly prison, kissing her gag and listening to her whimpers as he sealed her back in. He let her moan and writhe for a bit before putting her to sleep with a word.
Master laid himself down beside his sleeping slut, and smiled. He was satisfied sexually, that was certain. But of much deeper satisfaction to him was the trap he'd laid for his little slave.
It didn't matter how often she came, or how hard. It only made her hornier. Given the chance, she'd be a one-girl orgy! And the hornier she got, the more submissive she felt. Of course, she couldn't be much more submissive than she was, but the thought counted. In fact, every thought counted, since thinking made her horny too...
He fell asleep with that smile on his face, and woke with another as his slave moaned beside him, the alarm clock waking her into utter submission and frustration--as it would for the rest of her life.