"So, how old did you want to be?" I asked her.
"Oh, Ida know," she said, flipping her hair over one shoulder, "maybe, like, twenty-three? Then I'd be all done with college and, you know, *mature*." The look she was giving me left no room for misunderstanding what she meant by that.
"Why wait?" I said with a smile. "I wish you were 'mature' now!"
Cathy gasped as her body went through another transformation. In seconds she went from a somewhat under-developed 15 year old to a delightfully over-developed 15 year old! Her breasts, ass, and thighs swelled to rounded perfection, taking all the slack out of her clothes and straining the seams! She grew maybe an inch taller, but still had a slender frame that made her brand new double-Ds look that much bigger.
My wish had gifted dear aunt Cathy with not just a sexually mature body, but with the kind of 'mature' sexual appetite women her calendar age were reputed to possess. I didn't care if there was any truth to that bit of locker room lore, I just wanted it so that knowing someone nearby wanted to fuck her would get Cathy's body ready for sex in short order.
"You! You! Stop changing me!" Cathy screamed and stomped her foot
furiously. Of course this made her tits bounce and sway, and she froze as that sensation plowed its way through her pleasure center on its way to her crotch.
Maybe it was petty, but I was sorta pissed about her trying to manipulate me, so the last part of the wish had made her breasts and ass nearly as sensitive as her clit. Even without her over-active sexual appetite it'd only take a few squeezes or spanks to get her panties dripping wet and her moaning for more.
She managed to close her mouth and tried to fold her arms across her chest. I smirked at her expression as she tried to find a position that would hide her very erect nipples without stimulating her even further.
"Great, so what? Now I'm your sex fantasy, is that it?" She was finding it hard to be her usual bitchy self when her fingers kept stroking her tits despite how hard she tried to keep them still. "I, I don't have to stand for this, I've known you your entire life--"
"--And thirty seconds ago you were all but promising me sex if I'd make you an adult again. Know what? Not. Gonna. Happen." Her look of dismay fought with her body's incipient lust. "You're going to stay looking--and feeling--like this until I decide I like you better some other way."
Cathy made a whimpering noise and when I sniffed I could catch the faintest whiff of her sodden pussy. "You might as well take those clothes off, they're only going to get soaked anyway--if they aren't already. And it's not like anyone will find it odd to see you wandering around in the nude."
She was trembling and clutching her tits, too horny or scared or something to move. I could see white all around her eyes and this time I knew she wasn't trying to play me.
I leaned back against the door while I decided what to do next.