Stepdaughter's Ass Fucked in Front of Me

My biggest fantasy? Well, it’s not really the most conventional, and some might say it’s downright fucked up. I want to watch my new boyfriend fuck his stepsister. There’s something incredibly hot about seeing the guy you’re into going at it with someone you know, especially when that someone is your stepsister. It’s a twisted little fantasy, but it’s mine, and I’m not ashamed to admit it. Let me set the scene for you. It’s a lazy Sunday afternoon, and we’re all lounging around the house. My boyfriend, let’s call him Jake, is on the couch, and I’m curled up next to him. My stepsister, Ava, is in the kitchen, making us all some snacks. She’s wearing a tight little tank top that shows off her perfect tits and a pair of short shorts that hug her ass just right. I can’t help but notice how Jake’s eyes keep drifting over to her, and I can feel a little twinge of jealousy, but also a lot of excitement. Ava comes over and hands us both a plate of snacks, and as she leans over, her tits are practically in Jake’s face. He doesn’t even try to hide the fact that he’s checking them out, and I can see the bulge in his pants growing. Ava notices, and she gives him a playful little smirk. I can tell she’s enjoying the attention, and it’s turning me on to see them both so into each other. We start talking, and the conversation turns to sex. Ava starts telling us about this guy she hooked up with last week, and how he went down on her and fucked her so good. She’s describing it in such detail, and I can see Jake getting more and more turned on. I can feel my own pussy getting wet just listening to her. Ava suggests we all go to the bedroom and have some fun. Jake and I look