AITAH for keep bringing up to my ex about his cheating ??

Okay hello I would like some advice. Me F (25) have been broken up with my ex M(25 ) about 10 months ago we have 3 kids together and i recently gave birth to my youngest in may of 2025 and we broke up I. August of 2025 mind you that was the month of our anniversary. Im gonna go with fake names so we're gonna call my ex nate and were gonna name the girl he cheated on me with brkttany (34). Me and nate were together from 2019-2025 and we have 3 beautiful children together. My ex didn't know how to apply for jobs and he would make me apply for him. That part gets important, he made me apply to Logan roadhouse and he met the girl at his job as a cook since he is a cook as well. At first he didn't lile her he would insult her to my face and a couple months later they became friends. At first he wouldn't let me meet her because he said she was "shy" and I got pregnant with my son in 2024. In August mind you that part is important as well. They start hanging out every night as a group of coworkers there would be about 5 of them all together hanging out and he would never invite me to go with them to the bar and I understood that because we have 2 children and we didn't trust anyone to watch our kids and eventually I met her in October of 2024. Mind you tbey been hanging out for about 6 months before I met her. Everything seemed casual except for her to be overly excited about meeting me which was weird because he said she was shy. I didn't have any friends so I thought she was really sweet. Soon we get our own apartment amd she helped us move our stuff.

Now in Feb she moved in to our apartment on VALENTINES DAY of 2025 because of her wanting to leave her bf who she has a kid with as well and everything fell apart after she moved in he stopped being affectionate stopped cuddling with me even stopped kissing me or holding my hand when she was around. And then one day while he was drunk a couple weeks before I gave birth he told me they hooked up and usually he says really crazy things when hes drunk so I thought he was just doing his normal thing ...until the next day I asked him if that was true and he said they hooked up in July before I even met her. I froze when he told me and after that I got silent and she gave him an ultimatum to pick between me and his kids or her and he chose her and he gets mad at me for keep bringing it up months after I moved out

So aitah for keep bringing it up to him

I forgot to mention I would fall asleep and lock our hotel room at night and he blamed me locking the hotel room door and locking him oit for him cheating and he just had a new child with her actually and what hurts is right after he kicked us out he got her pregnant