After a night out you stumble in with your step-sister and her boyfriend. As soon as he leaves the room, your step-sister starts to tease you by fingering her tight pussy and flashing her perky little tits. She promises he won't catch the two of you, so you pull your cock out and she starts to suck. You cum in her mouth as she orgasms, just as he walks back in. She covers your cock with a blanket as you wait until he leaves the room again. Your step-sister jumps on your cock as he leaves, bouncing her juicy cheeks on it until she cums again. She stifles her moans but loses control while she rides you reverse cowgirl. She moans loudly, alerting her boyfriend to what you are doing. She doesn't care though. She rides your cock until you both cum one last time while he watches from the doorframe. At least you won't have to hide anymore hehe