Sister is Selfish Hypocrite! Advice?

Your sister sounds like mine. Solution to your problem for the time being is hide your things, give her the silent treatment and straight out ignore her! Don't talk to her and when she asks you what's wrong DON'T ANSWER HER. Trust me I'm doing that right now to my idiot sister so far is working she's trying to do nice things for me for the first time in our lives she's finally realizing how much of an asshole she truly is. Good luck with your sister and btw your parents are just like mine but just accept that for some reason they are how they are heck give them the silent treatment too! I've also done that. Sounds immature I know but sometimes it takes one to shut down for others to realize something is wrong.