Bored siblings, Michelle and her brother, find themselves alone and horny. Michelle fingers herself in the bathroom, her moans echoing. Her brother, overhearing, bursts in, catching her mid-act. They argue, but the tension turns into mutual masturbation. Michelle watches her brother stroke his massive cock, her pussy throbbing with desire. Just as they're about to act on their taboo attraction, a third party interrupts their risky rendezvous.