Quoting A Chelsie to Remember.:" I don't have a teen by my younger sister is 14. She has become so defiant, she wont listen, and lies ... [snip!] ... to my mom so my 14 year old sister doesn't end up raped or pregnant.. DO NOT JUDGE MY FAMILY & NO DRAMA. I'm asking for help."
Has she considered "boot camp"? Sounds like one of those rough teenagers you see in movies, you know, the wannabee badasses.. But seriously, you sister really needs a wake up call and a swift kick in the rump
Not to be rude but "dr phil! dr phil!", I have to throw in some silliness there to lighten the mood..