Divide and conquer

Rachel's grin gets even bigger as you explain everything and she is obviously mulling over the implications of your research.

"Well, there's no putting this genie back in the bottle; brother or not, I'm going to fuck you until you can't even walk, as much as I can!" she says, walking up to you. "I'm going to shower, you clean up your mess," she says stopping next to you. "And you," she said, turning to look at your throbbing cock. "You'd better be ready," she says and squats next to me, "for one wild. Fucking. Ride," she finishes and punctuates her words with soft licks of your cock head. You almost fell over, my knees getting weak with each lick.

And with that, she stood up and practically skipped to the shower. "Hurry up and clean, and maybe you'll be in here soon enough to help me wash my cunt...er...back!" Rachel said cheerfully. You watched as she disappeared around the corner of our little apartment and shook yourself back to reality.

You tucked your throbbing shaft back into my pants and set to work cleaning up the small pond of cum that was over by the intercom, and then set to cleaning a few other random spots around the apartment. You opened a window to help vent it; it smelled like a whore house in here, and that made me smile more than it should have.

Rach finished up in the shower at about the same time you finished up in the living room, and she came out, her hair wrapped in a towel and she made damn good and sure you could see her before she wrapped the other towel around her, twisting it together at her tits, and it was barely long enough to cover her body between her nipples her freshly shaved cunt, and her engorged pussy lips. She licked her lips and said, "Shower's all yours," just as Mom came in.

Your cock was hard as iron and standing up along your hip, only barely held in place by your jeans, Rachel is half naked and Mom probably heard what she said and maybe even saw her wrap the towel, and in a panic, you look down at the floor between us and I see the splotches of cum that had dripped out of Rach as she went to the shower, leaving a trail of your still-wet juices that you missed when cleaning up the puddle of your incestuous fuck sauce. Your heart was pounding at a million miles an hour.