A brother and sister, alone and restless, turn to each other for release. She touches herself, he masturbates, their shared arousal palpable. Caught in the act, they argue, but later, they explore their forbidden desires openly. Naked and hard, he towers over her, his massive cock throbbing. She imagines it inside her, ready to burst. Just as they're about to cross the line, reality intrudes, leaving them breathless and frustrated.