My stepsister gives me a blowjob next to my girlfriend

These young people are very crazy and don't care what their parents tell them. They are step-siblings and have been living together for two years. The boy has a girlfriend and tries to respect her, but his stepsister likes him too much and is about to be tempted to fuck her. The boy's girlfriend is always at home, so the boys have very few opportunities to be together. One afternoon everything gets out of control, after the girl discovers her stepbrother masturbating she gets too horny and stalks him in the living room while his girlfriend cooks, and sneakily kneels down to suck his cock. The guy gets very nervous, but lets his stepsister continue because no one has ever sucked him off like she has.