What's wrong with my sister?!?

[Common Sense]

If what you say is true and you ARE NOT exaggerating, then your sister has severe emotional problems and quite frankly, it sounds as though she has entitlement issues, zero empathy, is a recluse, substance abuser, kleptomaniac, and a possible pathological liar......which is all alarming because it sounds like she may be a ticking time bomb.

So, what do you do?

Without sounding like a bratty sibling, go to your parents and let them know that you are truly concerned about your sister's behavior. Do not make what you are talking about as if you are tattle-telling, rather be concerned. Don't get into great detail (about the CD's, just that she shop lifts), but be sincere and be concerned.