Bored siblings, Michelle and her stepbrother, find themselves alone and horny. They masturbate separately, Michelle fingering her wet pussy and ass, while he jerks off to her unwittingly exposed nakedness. A heated argument ensues when he catches her, but they soon reconcile, openly masturbating in front of each other. Michelle's eyes widen at the sight of his thick, straight cock, and she fantasizes about it filling her tight cunt. Just as they're about to act on their mutual desire, an unexpected intrusion forces them to halt their erotic encounter.