Argued with my MIL today because once again, the second I leave my room and go downstairs to get…

Argued with my MIL today because once again, the second I leave my room and go downstairs to get clothes, my sons tablet which was in the room goes missing(Not the first time she's taken my sons tablet either) . Because I argued with her, it caused an argument with my husband, so me being myself and pissed that he's taking that crazy bitches side once again, it got bad between me and him and then she wants to tell my husband don't start with me or touch me because she will call the cops on him and it will hurt the baby by making me stressed and upset...... This bitch 👊👊👊 if that's what you think then why tf you starting an argument with me?