A brother and sister, bored and curious, turn to each other for release. He watches her masturbate, her fingers disappearing into her tight, wet pussy, her moans driving him wild. She notices his erection, and without a word, they strip, their bodies pressed together. He fucks her hard against the wall, her legs wrapped around him, their moans filling the room. Just as they're about to climax, they hear footsteps, and they quickly separate, leaving them both unsatisfied and hungry for more.