EDIT/UPDATE Boyfriend might have f***** his cousin ??

This is a very long post so be prepared.

Okay so first i want to say that I'm not sure if I am just crazy or valid bc I have no concrete evidence I just have an OVERWHELMING feeling something is not right. So when my boyf & I started dating he lived w his cousin (not blood related this is his moms boyfriends niece, my boyf & her hv known each other for around 3-5 yrs) who is around his age has 4 kids one of the kids is 2 w a heart problem, I also have a 2 yr old daughter. He would clean,cook,help with her kids, & help around the house when he could financially. when we started dating she was furious. The first time he came to my house he was there for around 5 hrs, she blew his phone up the entire night telling him he is wrong for just "up n leaving with some random girl" (my boyf & I have known each other since we were 15-16 yrs old we are 22-23) I thought it was weird but didn't pay any mind I thought maybe they got into a fight before he left whatever not my problem or business at the time. So the next day I suggest he spends the night bc my daughter would b w my mom. We go to his house to get clothes & things for him & she was soooooo mad telling him that she "had money set up for him" a person wanted a tattoo but he had no idea about the session & had no supplies to do the tattoo. Even still she is mad bc she wanted to hang out with him. He ends up texting the person who wanted a tattoo & telling them he wouldn't be able to tatt them they are 100% ok w it & wasn't even sure if they wanted a tatt in the first place. She continues to blow him up all night saying how he is a piece of shit" that he "needs to get his life together instead of worrying about pussy" he needs to get his kids situated (he has two children who we are going through custody for atm which she knew. There is nothing much that can be done the mother keeps the children from him & she knows this too) etc she continues to blow him up so he turns his phone off in the morning she tell him that they needs to talk and that if they don't he will be kicked out he goes to talk to her & during the conversation she apparently was saying horrible things about me. I was kind of sad bc I thought we would end up getting along bc they were so close but really what could I do ? The end up making up & "move on" Flash forward a couple weeks I invite him to the movies, a movie he was VERY excited about so I thought it'd b nice for him to come w my family & Once she gets home he tells her he is leaving to the movies w me & she goes into a full blown panic attack, and is hysterically crying, yelling & saying he is choosing me over her & how could he do this to her etc begging him to stay with her & not leave. He sent me voice messages of this situation so I know tht she was actually going wild over it. I went to pick him up she starts to chase after him while yelling & throwing things at the car. I was shook bc I had never seen that kind of behavior over someone who is essentially your "friend" your cousin by marriage. I asked my sister about that situation & she agreed that it was weird as hell for her to do that. She writes me angry as hell telling me to tell my boyfriend he needs to come back etc I just ignore her cause I have nothing to do w it. She ends up blowing him ALL NIGHT long saying really horrible things about him & ends up kicking him out & they stop talking until her 2 ur old daughter goes to the hospital for her heart. They start to talk again. One day they were FaceTiming & my daughter had just woken up from a nap at the time it was SO hot so everyone was practically naked in my house. My boyf had no shirt on & my daughter also didn't hv a shirt on she hated to sleep w clothes on anyways. Well my daughter excited to see who is on the phone bc she loves other children climbs onto my bed & onto my boyfriends lap & tries to say hi his cousin makes a comment like "why is she allowing her child around a grown man without either one of you w a shirt on?" I just looked at him like wtf bc she is 2 yrs old & why are you sexualizing the situation ?? It's normal. Not to mention her children walk around naked while he is there too. She starts to talk about how I'm clearly an unfit mother & weird for allowing that & weird for not pushing him to get his kids & letting him lay up w me instead of worrying about his life. ( Id like to say that I was the main person pushing the custody case. I was the person getting up & going to court etc encouraging him to try all talk w his bm in the interest of their children. Everyone else kind of brushed it off) her 2 yr old daughter starts to say that she "doesn't want that baby on the phone & that she doesn't want to talk to her" that didn't bother me v much bc she is a child & children get possessive. What bothered me was the cousin co-signing, laughing & agreeing w her instead of correcting her & asking her to be nice. About a week later I am reading their messages ( we both go through each others phone mainly out of boredom & bc we are nosey. He knows I do this & I know he does it to me, we hv no problem w it) she says to him that her daughter said that my daughter was "ugly & that she didn't like her & never wanted to se ever again" she says she laughed & then agreed w her. He just says "wooow" & nothing else. This hurt my feelings. My daughter has a genetic disorder like me that affect her eyes & gives her small eyes. She is not his child so I guess he has no obligation to defend her but still felt like she is a small child & is defenseless but whatever. I didn't say anything & just let it go but told myself that that was the last straw & if she said anything else I was going to confront her. A couple

Months go by without them talking much cool okay right ? Hahaha no so I go to Vegas for a week with my friends they magically start talking again more & she is begging him to come hang out w her while he saying he is not really feeling well she accuses me of keeping him away & not wanting him around them. Which I never said anything to him about her except that her behavior was weird to me. I have never even seen this gurl in person. He goes to hang w her like 2-3 days while I'm in Vegas. She periodically writes him after I come back. Last night I was on his messenger looking for something he had asked about & seen their messages tht they were texting each other at like 1 in the morning so I get curious & read their convo (My boyf has me has his profile picture) she goes on to be very disrespectful towards me talking about how her & someone else screenshot his pic & was asking "what the fuck is this?" About my picture he doesn't say much really he sort of defends the picture but not much. Well this was it for me I told her she "wouldn't have to look at my picture anymore bc she was blocked for life & to let me know who else has a issue so that they can be added to the block list as well. You're welcome & have a nice life." I told my boyfriend I blocked her & he said he was fine with that. my boyfriend keeps so much to himself & it's hard to get any thing from him so Idk I asked him if they ever have been physical he says no but who would cop to that ? That's his cousin another reason I didn't want to ask him about it but I can't keep things to myself. I feel like her behavior in these past couple of months resembles a jealous Girlf or jealous ex or jealous girl he messed around with. Not a cousin who has a problem w me for a valid reason or is even friends w him bm & doesn't like me. I'd understand that sorta, but idk her behavior is weird. How he doesn't defend me or my baby against her is weird & hurtful. Idk you guys maybe I'm just being crazy or something but it think something went on between them & that's why she is so mad but like I said he keeps things to himself & honestly I'm not sure if I even want to know as that will hurt me further. I just can't shake the anxiety & horrible gut feeling I have been getting over this situation.

If you read this whole thing thank you ! Please let me know what you guys think if I'm just being crazy or what.

UPDATE 1

Some of you girls asked how I could be calm & not say anything to her. My boyfriend keeps things to himself & likes to downplay certain situations esp it thinks it will hurt me. Also I didn't want to deal with the drama of her I figured if she is willing to argue w him over nothing... she will most def argue w me over nothing & im just tooo drama-free to feed into her childishness. trust me I really did want to go off I would often write about how annoying & possessive she was. Even tho I never said much to him I'd talk w my homegirl about it & she agreed that it was weird and who would be THAT pressed over their "cousins" dating ? I'd jokingly call her his "girlfriend" whenever she would text or call. He would b annoyed but he

Gets annoyed when I say that about any girl. When I asked him why he didn't defend my daughter he said bc if he would've she would've went off & went as far as going to my house, driving around town looking for me, her & her bd would come to my house trying to jump me & since he wouldn't allow that he probably would've been jumped. He said that he has defended me in person to her a few times & each time she flips out on him & then contacts his mom going off on her so he distanced himself from her. He said that he hadn't wanted to 100% cut her out bc she had given him a place to stay while he was going through a hard time. I sad just bc she helped you doesn't mean she has rights to talk shit about your family. He said I was right & apologized & said tht after the profile pic convo he really didn't want to fuck w her anymore & that he should've blocked her a long time ago but didn't bc of the reason I just said. Thank you guys for you input really I feel a little better but still am sort of sus about it but will drop it for now.