Dear Teela, there is not a thing, and I mean, nothing you can do to change or correct your sister who is looking for ways to be the top dog. You, believe it or not, have to change your behavior. Negative drains from the positive. The first thing you could do is distance yourself from her. This is not a case of tough love. This is a case for Jesus. This is a case of her not loving herself or respecting herself. Her present behavior will drain you until you look in a mirror and see how you become just as she is. That is her goal. She is filled with fear and you have to know that she is not going to change while you are in her life. She has you as one, just one, of her victims. Get yourself out of her negative environment. This is not to say to be unkind to her or talk behind her back. Just back off. God gave us 10 Commandments and then He gave us one more that is quite important and that is to love one another. You need to learn to love yourself and when you learn this quite important lesson, you can gain confidence to be in the same environment with her and not have her opinions harm you.