Christina reached out and put her hands on Ashley's hips. "I have a solution for both our problems, Sean," she said, and pulled Sean/Ashley closer, so s/he stood between her knees.
Sean felt a tremor starting in his new female body. "What?"
Christina slipped one arm around her sister's waist, and used the other hand to pick up a lock of her sister's hair and tuck it behind her ear. "You wanted my body. And I bet, even in your new form, you still do."
"Yes."
"I never had the courage to tell Ashley—the real Ashley, I mean," Christina said. She blushed. Sean loved to see her blush. "I never told anybody. But I'm bisexual."
Sean/Ashley shook his/her head. "And?"
"And when Ashley hit puberty a year ago, and began to develop her new figure, I thought I'd never seen anything so beautiful. She grew breasts so perfect, she almost didn't need a bra, and an ass so firm, I just wanted to cup it in both hands and press her body into mine. We'd always been friends, and suddenly, my sister became this sexy goddess. And I wanted her."
Still standing between Christina's knees, Sean felt his female legs tremble. He knew where this was headed, and he had to admit, he didn't mind. But he needed to hear Christina say it.
"What do you want of me?"
"I want you to be Ashley. Since you're not really her in spirit, maybe it wouldn't really be incest if I made you my lover."
Sean shook her head. "Your own sister?"
"Haven't you heard of genetic sexual attraction? It's a scientific fact: people are often sexually attracted to close relatives. No one knows why. It's most common when relatives grow up separate, but it sometimes happens as a result of trauma. And it sometimes happens when a relative has trouble with sexuality."
"What trouble do you have?"
Christina's arm slid down from Ashley's waist, and she started circling her sister's butt cheeks with the palm of her warm, long-fingered hand. Her other hand stroked down Ashley's face, along her neck, and onto her shoulder, which she squeezed.
"We're a Catholic family," Christina said. "If my parents knew I was sexually attracted to women, they'd disown me. That's plagued me since I realized it was true when I was... well, when I was the age you are now, Ashley."
"I'm not really Ashley," Sean said.
"You're not her in spirit, but you're her in body. With all the tender longings a girl on the cusp of womanhood feels." Christina began to gently knead her sister's shoulder. "Can you honestly tell me that doesn't make you feel hot?"
Sean felt moisture beginning to pool between his thighs, but he wasn't sure he could be party to incest yet. "I'm not your sister."
"Be Ashley for me, though. Be the Ashley I need, who is so beautiful, so new, my perfect flesh and blood, but not really my sister. You want my body, Sean. And I want Ashley's body. If you'll be Ashley for me, I'll be yours, body and soul."
Sean reached out his hands. No, he corrected himself. ASHLEY reached out HER hands, and put them on her sister's thighs. They were so warm through her jeans, so firm and yet so yielding. "This is a sin," Ashley said.
"It's not just a sin. You're only twelve, and I'm nineteen, which makes this statutory rape. Yet I love you so much, Ashley, if you want me, if you let me, I'll be a sinner and a criminal just for you." Christina pulled her sister in, wrapped both arms around her tender virgin body, and pressed their breasts together. "I love you," Christina said, her lips brushing against Ashley's. "Be Ashley for me, and we can love each other, body and soul."
Then Christina kissed her baby sister.
When Christina lifted her mouth off Ashley, Ashley said...