it's complicated.... in law drama needing to vent

Today I changed my profile pic on Facebook to the pic below. His mother then called him to yell at him about finding out on Facebook and how she is coming down next weekend to "have a little chat" with him. I have her as a "friend" on FB because he made me but she can't see any of my posts but she was able to see the photo update. Part of me feels bad but the other part doesn't. She was gonna find out sooner or later but am upset that she feels it's her right to come yell at my husband for having yet another child with me. They don't like me because I am a strong and independent woman. His parents have actually told me that my place is in the kitchen, I shouldn't handle the families money because it's a mans job and I stole their baby boy away from them. I want to just tell his mother to leave next weekend and to mind her business but don't wanna make waves with hubby. What should I do?