AITA??? (MIL)

So this might seem all over the place (I’m sorry) but my mother had kicked me out when I was 19 (im 22 now) because we were really toxic for each other growing up and so I’ve been jumping back and forth from my grandmothers to my MILs house. Me and my SO bought a camper and settled on her property. I found out I was pregnant and decided to reconcile with my mother and tell her I was pregnant since my MIL had found out I was already. My mother respected my boundaries and everything and waited till I said it was okay to post about anything, my MIL took it upon herself and announced my pregnancy on Facebook before I got to tell ANYONE else about it. My mother and aunt threw me a baby shower, MIL tried to throw herself a baby shower so her friends could come (I’ve never met any of them). My mother has a room for our baby at her house since she lives an hour away and I go stay the night on weekends, MIL is now slowly taking things from my camper and putting them in her house. Here’s my big issue now, my baby is 3 months old now so that means he can spend the night with grandparents. My MIL has been watching him this last weekend so I can get free time to clean and have alone time with my SO. My mother offered to watch the baby since she didn’t have work (medical field night shift). I told her that it’s perfectly fine, I go to let my MIL know and all hell breaks loose. She went up to my mother and was threatening to call the cops and screaming at her while my mother was holding the baby, causing him to cry. And I said “if her seeing her grandson is going to be an issue then I’m leaving and taking the baby with me” she said “Good, then go” so i let my SO deal with his mother and I left. She had him for 3 days already and she doesn’t work and I live on her property so she can see him whenever, my mother sees him once a week, maybe. Now she’s saying sorry and that we need to forgive her. I’m not responding to her. I do not want my child around someone who acts like that at all. AITA if I put her in ‘grandma jail’ for a good while? Should I just stay at my mothers house? What do I do??? Help me please!