Collaborative sex stories let us write the plot together

(Her Secret Fantasy, continued by Klol...)

“Let’s move this to the bathroom,” you suggest.

Your girlfriend looks impressed by the intimacy that you share with your step-sister. It’s clear that you and Amy have a very special bond which hasn’t waned with time. As the three of you get into the bathroom, your sister immediately drops to her knees and pulls your dick out. She smiles from ear to ear.

“Boy, have I missed this dick,” she says. After waiting for just a moment, she wraps her beautiful, pink lips around your thick cock. She applies just a little suction, in such a delicate, feminine way, your mind immediately goes back to memories from Uni. You remember holding your sister by her hair while she gagged on your cock in the elevator. You remember fucking her while your room mate was away. You remember the numerous quickies you’ve shared in the library. The first time you tried anal.

“Whoa, slow down, cowboy”, your girlfriend says, and drops to her knees beside your sister. “Don’t forget me.”

She starts licking your ball sack. With her hands she is fingering your sister, whose mouth is sealed around your cock. Your groan with the multiple oral pleasuring you’re receiving. This is one of the best nights of your life.

Your sister starts moving her hands all over your girlfriend — caressing her back, squeezing her boobs, and then she starts pushing her down. Rachel is confused at first, but she goes with it. Your sister pushes her forward so that your girlfriend is licking you in the space between your balls and your ass, and then she gives her another nudge. Rachel understands, and crawls beneath your legs until she is behind you. You can feel her hands prizing your ass open, and your jaw drops.

Your sister takes your cock out her mouth and giggles. “I know. Consider it an early birthday present from us.”

The moment you feel your girlfriend’s tongue in your asshole you feel like you’re going to explode, but your sister bites down on the base of your cock to stop you. She winks at you before continuing to suck you up and down. You’re shocked by your girlfriend — you had never expected her to be an ass-eater! But there she is, eating you out from behind.

The multiple sensations are carrying you closer to climax — much faster than you expected. You have to make a decision fast if you want this roller coaster of a night to continue.