In a cramped attic space, a brother and sister, both longing for release, commence their private masturbation sessions. The sister, her breath hitching, fingers her slick folds, while her brother strokes his thick, veined cock. Their arousal grows, bodies flush with heat, as they listen to each other's quiet moans. Suddenly, their shared lust becomes too much to bear, and they lock eyes, acknowledging the elephant in the room.