Yes

You smile at your sister, "me too," you say. "I think—I think I just don't know this body yet. One second I'm fine, then another I'm so horny I can't control myself, and everything feels so weird, getting fucked instead of being the one doing the fucking, wanting something INSIDE me. That strap-on feels wonderful."

Gwen places a quick peck on your lips. "I got it for you. Almost as soon as you feel asleep, I went and got it, hoping for something just like this." She tucks your hair behind your ear and silence falls over the two of you,

"You're going to have to teach me to be a girl," you say suddenly. "I'll have to wear girl clothes and girl shoes and makeup and girl's femin—I'm going to start getting periods, aren't I?" you lament a little comically.

Laughing, Gwen shakes her head, her hair tickling your face. "Not for a while. You've got a baby coming."

The mood darkens for a second. You didn't want to look at it as a bad thing, but it kinda was. It was the reason you were **** to remain a girl for the rest of your life, which was bad enough, but you were pregnant on top of that, giving birth at age 18, before you finished your first year at college.

"What are we going to tell mom and dad?"

Gwen considers your question for a moment. "Same thing you told me, minus the spying I guess. I'll be there to back you up."

"I meant about us."

This time the silence drags on.

"I don't know that we have to. I mean, do you think they'd understand? You were my brother, who turned into my sister, who I found so attractive I had to fuck," Gwen rambles. "But if you wanted, I suppose we could try."