You get home from work to find your step-sister sitting on your bed with another man! You're shocked to recognise her ex boyfriend, and feel nervous when she informs you that she's been telling him all about how he was right to suspect that you had a crush on your step-sister! You're embarrassed and try to deny it but your step-sister soothes you, reminding you that her ex has a taboo fetish as well and that they used to roleplay together all the time. So there's nothing to feel awkward about! In fact she has a treat in mind for both of you - since you're both into taboo, she's going to let you share her and fuck her together! But only if today you prove how much you want her by both doing everything she says, and giving her lots of worship. You and her ex both agree and begin stroking your cocks for her as she strips off, leaving just lacy panties and a strap-on harness, fondling her strap on sensually as she gets to you jerk for her. Then she surprises you both by telling you to swap and stroke each other's cocks now! You're reluctant but she reminds you that you'll only get to fuck her if you do everything she says today, and she wants to see you jacking each other off, so get to it! You nervously start stroking each other as she encourages you, showing off her body and encouraging you to grip each other harder, making you spit on each other's cocks and telling you how she'll use her strap-on on both of you later! You both try to hide how you're starting to enjoy stroking each other, but she can tell you're getting into it and teases you about how much you're enjoying it as she gets you to edge your cocks. When you're both begging to cum for her she finally allows you to shoot your load all over each other's hands, then tells you to turn around and bend over - she's going to make you cum again, but this time with her strap-on!