Bored step-siblings Michelle and her brother find themselves alone and horny. Michelle retreats to the bathroom, fingers her wet pussy, and strokes her big ass, trying to keep quiet. Her brother, overhearing, bursts in, catching her naked and vulnerable. They argue, but later, they decide to masturbate openly in front of each other, Michelle taking in her brother's thick, straight cock. She fantasizes about feeling it inside her, just as someone enters, forcing them to abruptly stop.