What to do 😔 HELP

I need to vent here because I'm truly just heartbroken. Long story short I was great with every member of his family, would go over occasionally and everything was peachy. As soon we announced our babies gender and he proposed to me everything changed.two days after my now fiancé proposed his mom and I had a falling out. She got in my face yelling at me and saying things like "at your reveal you made it about you and you were on your fucking high horse" at my party she didn't talk to anybody just her family so I pointed out that it was a good time for her to mingle with my family (I did introduce her to all of my family) she then goes on saying "who mingles at parties that's just tacky".... me thinking aren't that what parties are about? She continues going off in my face asking me why her son treats her better than her. Her son and I broke up once after a way he was treating me so I left. She then throws that in my face asking "why did you come back, why are you here, I'm just waiting for you to leave again".... I'm heartbroken and feel like if she felt this badly about me why hasn't she said anything before especially when he told her he was going to propose. It's been 3months since this has happened. Not one phone call to apologize or anything. I seen my fiances sister the other day and she just gave me a dirty look. I haven't seen his family in 3months nor have I been invited for anything. They haven't asked about the baby at all. My fiancé does stand up for me but I feel like not enough and I'm getting sick of it. Idk what to do but my wishes are that they aren't there when in delivering my daughter. If they can't be there now why should they get to be there when the baby is born? Am I being selfish? What would you do? I sometimes feel like giving up and I do understand that they are now my daughters family but I refuse to be "fake invited " just so they can hog my daughter. I told my fiancé as soon as she calls to apologize I will go over and sit down with her. But she refuses and doesn't think she needs to apologize. Help ladies. 😔