Watch with her

So you wind up watching the movie, and you have to admit it's making you pretty horny, seeing those girls get cummed while you and your girlfriend watch... yep, you're hard as a rock.

You look over at Mary, and your shocked to find that she's got a hand unde rher dress, and is clearly getting herself off!

"Oh, sorry," she blushes, "I just couldn't help myselt... I get so horny sometimes. You know, you look like you could use some relief too," she says, nodding towards your bulge, " so why don't you oin in? We really should learn to be comfortable with each other's sexuality!"

You answer: "Well, I'll show you mine if you show me yours!"

Grinning, she slips off her panties and spreads her legs, sliding one cum-slicked finger back between her shaved pussylips.

A deal's a deal, so you whip out your big ten-incher, which is looking longer than usual, as hard as it is right now, and start stroking it.