Bored and alone, a brother and sister turn to self-pleasure, their masturbation session quickly escalating when he catches her in the bathroom. After a heated argument, they decide to explore their mutual attraction openly. Naked and excited, Michelle takes in her brother's massive cock as he jerks off, fantasizing about feeling it inside her. Just as they're about to act on their desires, an unexpected visitor forces them to abruptly end their erotic encounter.