AITA for leaving without waking my mom up after a massive fight?

My (20m) parents are divorced. My mom remarried almost a year ago to this very controlling, manipulative person. My dad tried to advise her against marrying this man, but she thought my dad was being petty.<br><br>My brother and I live with my dad. We visit my mom on the weekends. We used to visit her for a week but ever since she married this man, we can't tolerate him. He has this passive aggressive tone when talking to us and I've heard him make backhanded comments about my dad. <br><br>Last weekend, we visited mom as usual. She was cleaning the house like crazy and told us she was hosting a dinner party for her husband's boss and some other people in his field. Her husband, James, told us we weren't invited and we needed to go to bed by 8 cause he wanted to be able to focus on his job without worrying about waking us up. <br><br>We agreed but I told him we'd be up by 9 the next morning for breakfast. He said he'd have guests over till 2 or 3 am and to not make a noise. I said that's fine but we need to have breakfast with mom. He said it wouldn't happen and that mom agreed. I asked mom if this was true and she said yes. I lost it. I told James he can't dictate what he thinks we should do when we're visiting OUR MOTHER. I have never felt this disrespectfully talked to in my life. <br><br>He told me to show some respect or get out. I told him I'm not leaving, this is my mom's house. I went into my room and my brother followed. We heard James and mom talking and he was telling her that her kids are rude and uneducated. I had enough and I went out and confronted him. He told me to get out. Mom intervened and told me to stop being so rude. <br><br>This caused a massive fight and she took James' side. In the end, I was so upset and I told mom that she made her decision and I hope she enjoys her life with James. I told James that we're not the rude and uneducated people, you are. You're the one who tries to isolate her from her children and take over her life. You're the one who tries to keep her from her sons because you know she loves us more than you. <br><br>He slapped me. My mom apologized to James and told me and my brother to get out. We packed our bags and left. I didn't contact her for two days and it was my dad who encouraged me to call her and check up on her.<br><br>When I called her, she told me she was upset that I left without making sure she was okay and waking her up the next morning. I told her that she told us to get out and that I wasn't going to wake her up after what happened. She said James is very sorry and he loves her and he'd never hurt me or my brother and I shouldn't make a big deal out of this.<br><br>I told her that I was the one who got slapped and I'd make it a big deal if I wanted to. She started crying and told me that I was her son and she'd always defend me but I shouldn't try to ruin her marriage. I told her that she needed therapy and she said maybe I was the one who needed therapy to deal with how i feel about James. I felt like she was invalidating my feelings. AITA for not waking her up?