"Share"

Your mind is foggy. After all, there's no way you can be seeing what you're seeing, be containing the raging erection that you have, and think clearly. Telling Tess you want to share Katie is a risky move. After all, the two of them just said they were putting on a show for you. Joining it is taking up to a level that they, perhaps, weren't intending.

Then again, were they really expecting you to just sit there and watch all night?

Your request to share hangs in the air without response. Katie continues to do what she's been doing, reclining, leg's spread, body shuddering. And Tess doesn't answer at all, until finally she speaks up. "Well, are you coming over or not?"

And that's that, you think. What percentage of people get to have a threesome with their gorgeous girlfriend and her gorgeous sister? One percent? Less? You're probably one of the luckiest men who has ever lived as of this moment.

You get up and walk over. You don't run over, not only would that seem too ****, but you're not sure you could even move quickly at this point. You have to focus on walking, your mind is so overtaken with lust, as you get closer and closer to the sight of Tess, pretty, fun, lovely Tess with her wet mouth.

She lifts the back of her hand to it and wipes it clean a little, though poorly. You wonder if she just does so for your entertainment. And soon you're there, right there, kneeling next to Tess, looking at her wet, messy lips, looking at your girlfriend's spread thighs, her juicy, shaved, aching twat. The fact that her sister was just in there, making her moan, is almost too much. Your cock feels like it needs to explode.