After they'd both come down from the high, Rebecca slowly pulled her cock out of Ty's ass, and while staring at her slowly softening shaft, Ty asked, "Do you, uh... mind if I make you keep your promise now?"
"Yeah, sure," Rebecca answered, and she felt a weird sucking sensation as Ty wished her cock to shrink away. It felt weird, how her virility was being sapped away but her horniness only grew as her female parts reformed. The nerve endings in her cock concentrated around a smaller area and formed her clit, while her scrotum split into labial lips again.
As Ty saw her pussy return, his own excitement quickly mounted and he grew hard. He decided to ease her back into her feminine parts, and got between her legs, starting to suck and lick at her slit. Her excited pants and moans egged him on.
Once he could tell she was so wet he'd be able to fuck her as hard as he wanted, he sat up and kneeled in front of her, his cock perfectly positioned so he could stick it in her. He looked Rebecca in the eye and purred, "I'm gonna make a quick wish before I stick this in you."
"Yeah?" the girl replied.
"I'm gonna wish that when I cum in you, what will happen is your biggest kink," Ty whispered. "Personally, I really want it to be breeding, like mine. I've fantasized about fucking you up and filling you with my cum so many times."
Rebecca blushed hard at that. but when Ty pushed against her slit, her lips eagerly opened and her pussy took him inside her. She was surprised how big he felt, his shaft filling her and rubbing along the G-spot at the top of the back of her pussy as he thrusted.
At the same time, Ty felt her pussy tightly clench around him, and couldn't hold back. He came hard inside her, panting and kissing her passionately as she peaked herself. They clung to each other, and kissed messily as they came.
Ty pulled out at last, and wondered what would happen to Rebecca...