My Little Sister (1971)
A girl takes her younger teen sister to a party. As the partygoers get drunker the talk turns to sex, and the older sister decides to let the partygoers have their way with her, whether she likes it or not.
A girl takes her younger teen sister to a party. As the partygoers get drunker the talk turns to sex, and the older sister decides to let the partygoers have their way with her, whether she likes it or not.