"Just like this. Right now"

You almost can't believe the words have come out of your mouth. But people in strange situations say strange things. Then again, considering your situation, saying anything else would probably be strange.

Still, you've just told Greenie that you want to fuck her immediately. It's an odd thing for you to find yourself saying. And it's an odd thing to know she's not going to hesitate to respond.

Which she doesn't. You feel her pull your cock out of your pants. And you feel it rub up against her flesh under her skirt. It takes you a moment to realize... she's not wearing any underwear. She hasn't been wearing underwear all night. She's been waiting for this to happen all night. Don't be ridiculous. She's been waiting for this to happen since the plan was hatched, how ever long ago that was.

Tess's hand, still between her legs, still on your member, starts to position it in the right spot. And then lifts her body up and slides down on top of it.

The moment is immaculate. Tess. Greenie. Your girlfriend's sister. Her warm twat is now wrapped around your thick, throbbing cock. You feel amazing. And she looks down at you smiling as she starts to bounce on it. She seems to be feeling amazing too.

She leans in and gives you another long, passionate kiss. Your cock is inside her. And now your tongue is inside her. It's almost too much to process.

For a moment you remember that Katie is sitting across the room watching this all too. And you think to try to glance over at her. But you're distracted by something more immediate. Tess is pulling off her top. Which she does in one swift move, exposing her perky breasts to you. They're phenomenal, b-cups, nipples much bigger than her sister's. They bounce as she bounces. You feel like you could watch them forever. As you do, and as Greenie bounces, her brown hair flying wildly around her face, you grab her skirt, totally bunched up at her waist, and start to pull it up. It really doesn't matter, but something in you wants her naked.

As you attempt to pull the skirt up over her head, it gets stuck a bit trying to get over her tits and then her face. She has to stop to help. Again, you're reminded that your situation is about 50% arousing, and 50% awkward. But the awkward is kind of what makes it wonderful. It's so much better than if this moment were out of a porno or a staged movie scene. The awkward is what makes it real.

Greenie giggles as you finally get the skirt pulled off her head. She looks down at you, shaking her head, smiling a smile bigger than any you've seen on her in the past. Then she starts herself bouncing again. And you help.

And finally you remember to glance over at Katie, hoping that she's enjoying this moment as much as you are. You peer your head around Tess's tight, nude, body, to glance at your girlfriend.