In the dim light of their shared bathroom, a curious sister and brother discover each other's hidden pleasures. She fingers her wet pussy, big ass jiggling, while he jerks off excitedly. Caught in the act, they argue heatedly, but soon make amends and decide to masturbate openly in front of each other. Naked, she takes in his thick, straight, huge cock as he lustfully strokes it. Soon, she fantasizes about feeling that massive dick plunging into her tight cunt, but their erotic encounter is abruptly cut short by an unexpected intrusion.