Your girlfriend’s step-sister has been flirting with you for years. She’s hiding behind a curtain in the house, waiting for you to step into the same room. She quietly reveals herself once she knows you’re in the room alone, and instantly starts to tease you. She really is the hotter step-sister and she knows it, and you guess she must be crazy in bed, by the way, she dirty talks with you. Once she’s got your dick really, really hard – she knows you can’t resist. She has you fuck her right there and then, pushing her up against the wall as you take her from behind. She’s really loud, and you’re hoping no one was able to hear…and she threw off her panties somewhere, but neither one of you know where they landed. She kisses you goodbye, and you go back to the party like nothing happened.