Wow! Your sister definitely has issues, though it's unclear exactly what they might be- I'm guessing bipolar related though. You should try to talk to her- maybe yourself and other family members- say that you are worried about her and think she should think about seeing a therapist/psychiatrist- she definitely needs t. Be gentle- I know, depending on your upbringing and locale, the thought of seeing a p doc is often seen in a negative sense. There's nothing to be ashamed about- try and help her see that. Good luck with it all.