This is my second summer out of college, and my first back home in a while so I've started to really spend time with my family and, frankly, it's scaring me. The thing that worries me is my sister. She's 16, and she's completely off her rocker. Over the summer, just this summer, she's been caught shoplifting, joyriding in a stolen car with friends, started smoking cigarettes and joints, drinking heavily, talking back, making up huge, incredible lies, totally and blatantly lied about who she is with and where, and even nearly got in a physical fight with my stepmother. She's refusing to even speak to our mother, and despite attending four therapy sessions a week (for bulimia and depression), and taking prozac, there is nothing the family seems to be able to do to get her under control. Just last week she brought her boyfriend home who, according to her was a 17 year old rising senior at Newman, the best local high school. Turns out he's actually a 20-year old, high school dropout who works part time as a construction worker. State laws aside, that's not right. I don't know what to do. My parents are in shock. She's the total opposite of me and my other three siblings. It's as though I went away and came back to a whole new person. She's doing everything that she shouldn't. Her last school nearly expelled her after she was found on campus drunk. My dad had to convince the school not to expell her so that it wouldn't show up on her college application, but it's the third school where this had happened in the last year. And this is a 9th grader. I don't know what to do, how to act, what to say, does anyone have any thoughts?