My mother-in-law is toxic: Am I wrong for cutting her out of my life?

Question: “My mother-in-law has never really liked me. I’ve been with her son for about seven years, and we’ve been married for almost a year. We also have a 1-year-old daughter together. Every time my mother-in-law comes over, she makes comments under her breath about me and gives me dirty looks. For example, she’ll comment on how I never cook, how lazy I am, and make rude comments about my weight or clothes. She’s also claimed that I took her son away from her and I’m the reason she never sees him anymore. 

After I had my daughter, she started to make comments about my parenting, even shaming me about choosing to give her formula. She would suggest I take on all parenting tasks, like diaper changes, and never her son. My husband never does anything about the comments she makes and will make excuses for her. Recently, I went out dancing with my friends and sister-in-law and posted about it. My mother-in-law saw it and immediately posted, 'and where is your husband?' I told my husband and his response was 'what was wrong with her comment?'