The ride home

The two of you cleanup and then head down to your car in silence. You get behind the wheel while Marcie stares out her side window in silence, the golden "A" glistening around her neck. All you can think about is the load of your seed that you just pumped deep into her womb. What if you got got her pregnant?

You're slightly afraid and slightly sickened by the thought. You're also getting more than slightly hard just thinking about your twin sister bent over that exam room table for you.

You have fucked some fine girls through the years, but damned if Marcie wasn't the best piece of ass you've ever had. You know you shouldn't be thinking about your twin sister that way, especially not with all the pussy that was now available to the youngest new Alpha male in town, but you cannot help yourself.

"I don't know what to say but thank you," she says at last. Marcie turns nervously away from the window to look at you, and then her eyes widen as she sees the unmistakable bludge in your pants. "Oh thank god, its not just me!"

"What?" you ask.

"I can't help it...my panties are fucking dripping over here," she tells you. "I was sitting over here cursing myself for being so turned on by my brother, and you look like you're thinking the same thing."

"I can't help it, Marcie," you admit.

"We can't do that again! But damn, I've never had a guy make me cum like that. You felt...perfect."

Your mind was racing. This was so wrong, but part of you didn't care. Part of you wanted to go for round two despite the risks...