Weird you are in love with your son’s cousin.

A bit complicated, but I want to try to simplify as best as I can.
I had been dating this guy who I really liked. I was falling in love with him quickly.
One day, he mentioned to me that this girl, who I’ll give the fake name “McKenzie” had told him she “wished she met him before”Eric”(another fake name). Eric is my boyfriend’s cousin. McKenzie and Eric weren’t together anymore, but they have a child.
Which is my boyfriend’s cousin. Like, biologically.
See, she and I were friends, and what’s particularly mind bottling is Makenzie had told me about Eric cheating on her with his ex, and telling his ex he wished his child was with her.
Understandingly, Makenzie was very hurt by that because “it would mean the child would be a completely different person. Like he wouldn’t even exist.” She said.
So, yeah, shame on Eric for saying such a thing.
I was shocked at first,and then annoyed. Isn’t that hypocritical??
Wishing she met my boyfriend before Eric? That would also mean her child wouldn’t exist. And even if she intended for it to not mean that, that’s her ex’s cousin. And her son’s cousin. That’s a little weird to me,tbh.
Even though I tried to sympathize, I couldn’t get past that part. I don’t think I ever could.
Lastly, I was annoyed that she would speak up about her feelings after finding out I was dating him. I mean, she already found herself a new boyfriend and had another child with him.
Also, she is very beautiful, and honestly I was intimidated. I really love my boyfriend and I can’t help but get anxious about any idea of loosing him.
So, in summary, she crossed a boundary between us as friends, confessing feelings for my boyfriend, while she’s in a relationship with the father of her other child,
She crossed a boundary among family by acting on her feelings for my boyfriend, the cousin of her ex(child’s father Eric), and her child by confessing something that really could have been kept to herself as an understandable attraction.
The hypocrisy is probably the least of all these issues, but hypocrisy is one of those things that really does get on my nerves.

It’s been a few months since my boyfriend had mentioned this to me. We’re expecting a child together and I’m so happy with him. I didn’t have to really worry about Makenzie because she’s all in another state. However, I know there may be a point in time that we all end up around each other for something. Christmas, or a wedding, or whatever. I just hope that my boyfriend will be respectful and keep a boundary with her. If she’s struggling with her feelings, I think it’s best to stay out of that business for me and my boyfriend. She should sort through that herself.