Mother in law and sister in law are so toxic to my marriage

Hi Brooke,
I really hate my mother in law and sister in law. We had a fight because she kept talking behind mind back. I called her out on that. I don’t want to see them anymore. My mother in law keep is getting in my life. Whenever I hear anything from her or see her name, it drives me crazy and the thought bother me the whole week. I don’t know how to handle the situation when her name pop up or anything that involved her. What should I do to stop to feel so upset whenever I hear or see her name? I already cut her off my life but she still find excuse to get into my life. I set my boundary and cut her off my life for good. I don’t want to come to visit her anymore but my husband want me to come back with him on Thanksgiving. I don’t want to come to her house anymore. She is full of negative. Whenever I enter her house, it likes coming into hell. She tries to get my husband on her side. My husband tries hard to split his love between me and his mom. It has been going on for 8 years. This year, I told my husband that I can’t stand his mom anymore and I want her to be out of my life. I know my angry and upset feeling drive my action of being upset or mad all day whenever I see her name pop up. I really hate this woman. If you could please give me some advice on how to stop the feeling that bothering me when I hear or see her? I already try to avoid her but I’m sure on Thanksgiving, I have to see her…I just worry she will be the problem that my husband and I will get divorce.
Thanks Brooke!