Nod weakly, and open your mouth

You gaze into his eyes. His eyes are eyes of lust, of power. Looking into them, there's a torrent of conflicting feelings. Fear. Love, as a son for his father. Lust. Infatuation. And another love, as a woman for her man.

"Do you love me, Daddy?" you ask him. "You don't just want to use me for your promotion?" He shakes his head. "This is for the good of us both, babe," he says, and as he does, you nod, opening your mouth. He takes the pill, places it on your tongue, and you swallow it down.

"Now, it's about time I take your virginity." His hands grab the dress, and pulls it down. A moment later, you're naked but for your high heels. He guides you over to the bed, pushes you down. "Spread your legs, girl," he commands, and you expose your inner folds to him. "Look at me." You gaze upon his body as he removes his jacket, unbuttons his shirt. His broad, muscular chest solicits a little gasp from you. Of course you've seen it before, but you've never found it this... attractive. And when he drops his pants, removes his underwear, the cock that springs out looks bewitching. It's big. Thick. Too big for your small frame, you think for a moment. No. Big enough to fill his girl right up. He steps upon the bed, between your legs. "How do you like it, Julie?" he asks you. "Please, Daddy, it's too big. I don't want to..." but your voice betrays your actual feelings. He places the head at your opening, and leans in over you, grabbing both your wrists. "Too bad. Daddy wants to feel his cock inside your tight little virgin cunt. I'll be gentle, since this is your first time. But that'll just be this first time." You feel him push inside of you. It's filling you, stretching you, pushing your insides apart. You moan, in a mixture of pain and pleasure. "Please, Daddy...stop," you moan. "It won't fit!" But he holds you down, pushes himself further in, until you feel his crotch press against yours. Then he starts backing out. The emptiness he leaves behind is yearning to be filled up again. And soon, despite your continued feigned protests, he pushes himself back in. His pace quickens. There's a pressure building in your crotch. You're closing in on an orgasm. "You like it, don't you, you dirty little slut! Admit it!"

"Yes, Daddy," you moan.

"I'm going to fill that fertile little pussy of yours with my cum. Wouldn't you want to feel my cum spurt inside you?"

"Yes, Daddy."

"Wouldn't you like to have my little baby growing inside you? To be stuck as my little girl, to become my pregnant, submissive wife?"

"Yes, Daddy," you reply again, the pleasure you're feeling to great to protest. Fertile? Baby? Stuck? Right now, that just sounds hot. You wonder if that X-Change you just swallowed was street X-Change, Black Market X-Change. Would Daddy do that to you? Would you want Daddy to do that to you? Daddy deciding that you wouldn't get to change back, that you were to carry his children - children to replace the one he'd lost when you became Julie - that thought is what pushes you over the edge, and your entire body starts spasming, shaking, convulsing, in an orgasm that takes over your entire body, drains you.

The first one is followed by several more, somewhat weaker, before you feel your Daddy harden even more, twitching, spurting his hot cum inside of you. You wrap your legs around him and press him inside yourself, basking in the afterglow of your orgasms, in the submissive pleasure in knowing you've pleased him, in a warm euphoria of feeling his seed inside you, the most intimate act you can imagine, as he collapses on top of you.

Soon, his softening dick slips out of you, and he rolls off, pushing you over to your side and embracing you in a spoon. As you both lie there, resting, you contemplate the meaning of what you've just done. What kind of X-Change did you just take? Could you get pregnant, and would that result in a permanent change? Was that your dads plan? You were only supposed to be his arm candy, not actually go to bed with him. How would this affect your relationship? Even if you could go back... could you, really? Did you want to?

Inbetween your butt cheeks, you can feel your dads member growing harder again. His hand is playing idly with your nipple, causing small ripples of ecstasy. You know he'll soon be ready for a second round. The emptiness between your legs yearns for another round. Do you want to interrupt that to talk to him? Do you just lay there, waiting for him to take initiative, whether that's talking or another round of sex? Or, maybe you do something else? Maybe you give his member some oral encouragement, to make it nice and hard again?