To start my mother and I have a good relationship and I have a good relationship with my sister but my sister is very hateful with my mother. My sister has always lived in my mother and fathers home, she has raised her family there. Her kids have both left now as they are grown so its now her and her husband there. She rarely has a good word to say to our mother and its like she's on pins and needles in her own home. My mom is a very good person and would do anything for my sister. I can't figure out for the life of me why she is like this. My mom will leave at times and comes to my house to let it all out. She don't know what to do. I'm not sure what I can do but only comfort her when she needs me. I don't know how to handle this .