In a cramped French bedroom, a brother and sister, both in their late teens, find themselves alone and horny. She starts to touch herself, her fingers exploring her wet pussy as she bites her lip, trying to keep quiet. He catches her mid-act, and they argue, but their tension soon turns into mutual desire. Naked, she takes in his thick, hard cock, and they masturbate openly in front of each other. Just as they're about to take it further, someone walks in, forcing them to abruptly stop their intense encounter.