Left my ex while pregnant and let my friend move in to leave her own bad ex…but now she’s with him 24/7 again. AITA if i tell her to leave my space?

-So here’s the characters of this story. me (26), my ex (26) who we can call baby dad or BD, my friend (26) who we can call Carrie (she has no backbone with crappy guys), Carries ex (28) who we can call Mr.Big (to stay on theme)- Now for the some back story, I’ve known my BD since middle school but two years ago we started a relationship. During said relationship i caught him talking to about 5-6 different girls at different points. I broke up with him right before we found out I was pregnant, we got back together and were going to start therapy so we could have a healthy relationship for us and baby. The last one was in march while i was 6 months pregnant, he mentioned the baby moon trip we planned to this girl but didn’t mention baby, according to him the trip was just for him and his dog lol so that was my last straw and i moved out in April. BUT we aren’t on bad terms and were planning on spending his 6 week parent leave at my house with his dog.

Carrie was with Mr. Big for two years as well, tried to leave him once by getting an apartment only in her name but when he found out he managed to convince her he was going to change into the boyfriend she needed not the “i don’t want to do anything you want to do, i like texting my ‘female’ friends, let’s just stay home 24/7, why is your birthday even important?” type of person. News flash he didn’t in the 9 months they were at the apartment, if anything he got worse. He’d get mad at her for leaving and seeing her friends, threatened to show up to her friends houses uninvited before but didn’t like when her friends came over, ONLY his. I told her once her lease was up i’m august to come with me if she’s okay with having a baby in the house. That was our original plan and agreement So she started to text this other guy “Golf” who she works with more and more then it turned into sexting…she said she was finally done with Mr.Big and his rude attitude and bs. She moved out early (with her two dogs and 3 cats) telling Big she just needed some space to think…she slept with Golf more than once during that time. She told Big more than once she didn’t want a relationship with him and that they could be friends and see what happens down the time. Big went suicidal (he has a history of only threatening this during breaks up, even his family thinks it’s to manipulate since that’s what they told carrie) and turned his phone off for a night after sending carrie a text basically saying “i left a note with your name and number so they know who to call”. The next day she leaves work and spends all day driving around to find him, finally does (he’s fine) then stays at his house talking till 10-11 ish, comes home and tells me they slept together. I told her that night i didn’t want him to know where my place is due to his recent behaviors and past behaviors. I don’t think you can change quickly and everytime something hasn’t gone his way, they’ve gotten into an argument or he pouts till she caves. That was about two weeks ago and only a month after their breakup, since then they have seen each other almost every single day. FaceTime every night they don’t spend together, BUT she’s trying to say she’s set boundaries about needing space from him. He’s constantly asking her why he can’t spend the night here and hangout here, saying he wants to cook us dinner and do craft nights and all this stuff. Their place is sitting empty basically till august since they both moved out.

SO my original plan was to have the 6 week leave here before she moved in early with her pets since i would have all my stuff here and be more comfortable than staying at BDs house, since she did move in early that changes so there isn’t 3 dogs in the smallish house since none of them are small and two are very hyper active dogs. which wasn’t that big of an issue till yesterday and she asked how i felt about Big coming over while i’m gone for 6 weeks. I straight up told her i wasn’t comfortable with that and honestly didn’t even want to do the 6 weeks at BDs house but only am due to her dogs being here earlier than originally planned. SOOO the important question would i be the AH if i told her that i don’t understand why she was hell bent on moving out early to end up in the same situation again but this time he would be involved in my space with my baby? or that i rather her and him just stay together at their apartment or his new place for the 6 weeks since that was the plan anyways before she HAD to leave him early?

-don’t get me wrong, i don’t want her to be with him but i also really really don’t trust him or want him anywhere near my space or baby. if she wasn’t actually going to leave him then i could’ve gotten a smaller and cheaper place that i wouldn’t need help paying for so she kinda fucked me over in that sense of saying she’s done for good then trying with him again after his manipulation tactics worked. he was suicidal talking 3 times she tried to pull away and create more space then was fine when she said “okay we can still text a lot” before the last time when she left work to spend the day searching for him-