bio caddy

My mother-in-law is a very unhappy woman. I just don't like her personality. Her own kids fight with her. The only one that feels sorry for her is my boyfriend. she has been living with us for 3 years. The other day I had an argument with her and my boyfriend. Before you start feeling sorry for her, you should know that she is still young and healthy. She is staying with us so that she can work to send money back home, where her 16 year old son and boyfriend live. She contributes a few bucks a week to the house, but most of her money is sent to her hubby. She doesn't talk to me and walks around my house with a bad attitude. I am the one paying the entire rent each month because my boyfriend can't find a job. A few years ago I found my name in the freezer, she was doing some type of voodoo on me. she told me that I almost died this year because I am not nice to her, She thinks that GOD punishes people who do bad things to her because she is an innocent person… I think she might be crazy. She also tries to make her kids feel guilty about the fact that she had to raise them on her own because she got divorced twice. She also accused me of putting nasty spells on her son, I have never done anything like that to anyone. Am I wrong for not liking her? Now she wants to leave, I think she should but I know my boyfriend is sad. I feel like this could ruin my ten year relationship. What should I do? Apologize and beg her to stay or help her pack?