MIL says the meanest things

I’m stuck on a family trip with my mother in law. I’ve been very low contact with her for the last 2 years but really starting setting a boundary this last year. This trip has been hard for me because i cannot escape her and her awful comments. She is awful for my mental health and I do not like the person i am around her because i have to be defensive. When i was trapped inside alone with her she got the courage to ask me why I blocked her on Facebook. Before i could even answer she says “DH says you get upset when i post pics of baby” to which i told her that yes it upsets me because all you do it take 100 pics of him then flaunt him all over Facebook and don’t even ask my approval. She then told me that she has “rights” as a grandma and can post pics of my son if she wants. My MIL kept digging and asked why we didn’t have a better relationship and I basically flipped out on her and called her out on all her poor behaviors over the years from making demands for our wedding to making awful comments and blaming ME for my sons birth defect. I told her that she says mean and hurtful things and that i set a boundary with her to protect me and my son and whatever relationship she has with my husband is up to them . She then gaslit me and said that she doesn’t remember doing or saying any of those things and that I’m “too sensitive and need to move on”. I’m so done with this woman.

MIL says the meanest things