I hate my monster in law

I just can't get along with her!! I try and try is impossible. She has messed up every special moment in my life with my husband and kids. The worse part about it is she knows she can't get away with anything. All because she's a single parent my husband feels so sorry for her. I'm over the edge I'm at the point where I want a divorce.im ready to walk away from everything.i won't have her too involved in my life. I'm so over this!!!!!!!