Bored siblings, Michelle and her stepbrother, find themselves alone together. Michelle retreats to the bathroom, her fingers exploring her wetness, her ass pressing against the cool tiles. Her stepbrother, overhearing her pleasure, bursts in, catching her mid-act. Anger flares, but so does a forbidden curiosity. They argue, then make amends, deciding to masturbate openly. Michelle's eyes widen at her stepbrother's thick, straight cock. She fantasizes about its length inside her, just as they're interrupted, their taboo encounter cut short.