Venting about my day

I’m in a bit of an awkward situation with my fiancés family. Well more like his dad and his dads gf. Last weekend my man went up north with his dad. I was going to go but being so pregnant we decided it was best for me to stay home. Anyways his dads gf was supposed to show up with her daughter which I thought that’s cool. Well she shows up and says to his dad that it’s not the life she wants so she turned around and drove a few hours home because he was having a few drinks. So he goes home a few days later she wrote him a letter basically breaking up with him and leaving her “engagement ring” on his pillow. Earlier today my man and I went to their house to get a boat, and literally I thought that was all we was doing, anyways it turned into some whole big thing and the girlfriend was there. Pretty much everyone was busy so I just sat in the truck, also paced around for a few minding my own business. Well my fiancé got upset with me because I wouldn’t go hang out with her, and honestly I felt uncomfortable after hearing all the horror stories and how unstable that situation is, so I kept my distance. My man even gets upset and wants he’s gone. Idk I’m the the person to make good conversations with and also had I of known it would be like that I would’ve stayed home because at least then I’m not really hounded to do much since I’m late in my pregnancy. I’m not sure how to handle people with a grain of salt like either their coming or going. It’s hard for me to form relationships with those who are not around long term, and this being one of them triggering situations I’m not sure how to handle it in the future. For my sons sake, yes here and there that’s easy but for me to be in that predicament it wasn’t easy.

But now my man is trying to say I want nothing to do with people in his life but that isn’t true. I like most of everyone I’ve met in his family besides the dads gf I just don’t see the point if she may or may not be around for a while. I’m a very reserved, quiet type of person as is. Doesn’t make it any easier.