A brother is curious and tries to peek at his sister in the bath. He slowly opens the bathroom door so she won't notice, and he witnesses his sister peeing. The brother is aroused by the sight of his sister's pussy in full view for the first time, and he can't contain his excitement and attacks her. His sister trembles as he desires her body. Although she refuses penetration, he inserts his penis into her wet pussy, and they engage in forbidden incest.