There was a movie about a teenage girl I think it's from 2000 or later and she has an older boyfriend if I remember right she lies about her age but anyway she's known for being very promiscuous and I think even has a sexually oriented nicknameshe eventually asks another young girl to join in their relationship but her boyfriend begins to like the other girl more than her she gets jealous and accidentally stabs him with a knife... I don't really remember more than that but it ends with her being caught and I think sent to a foster home and she is talking to the camera about how hard it is for her to act like a kid again