Bored siblings Michelle and her stepbrother find themselves alone and horny. Michelle masturbates in the bathroom, but her stepbrother walks in, catching her in the act. They argue, but later, they decide to masturbate openly in front of each other. Michelle's eyes widen as she sees her stepbrother's thick, straight cock. She fantasizes about him fucking her, and just as they're about to act on their desires, someone enters, forcing them to stop.