My niece (age 14) nephew (age 16) my brother's kids) would always stay with us in the summers. This was to help out my brother because he's a single dad and childcare in the summer was hard for him. As the kids got older they continued to come because they liked to.
Anyway last summer my nephew became particularly close to my husband's niece (his brother's daughter) and she got pregnant. After everyone found out about the pregnancy there was a lot of yelling and everyone was blaming us because apparently she got pregnant at our house when we weren't there. Which was silly in our opinion because we know they aren't watching their kids 24/7 now that they're all teenagers.
My brother and I got into a big fight about how we're responsible for this and about us doing such "a shitty job" of watching his kids which ended in me saying fine we won't do it anymore. We didn't talk again for a couple months after that. We did eventually start talking civilly with each other again about other stuff. We never talked about the whole baby thing again. My husband and I just left our brothers to deal with it and talk directly with each other. Which apparently isn't going great, but we're trying to stay out of it.
Anyway my husband's niece is supposed to be having the baby this upcoming month and my nephew wants to be there for it. So my brother brought up wanting to send his son to us early so he could be there when the baby was born.
I was like no. I told you forever ago that we weren't doing that anymore. My brother is confused and annoyed by that because he thought that was just something I said in the heat of the moment when tensions were high and that obviously he didn't mean those things he said either and that he thought things with us were good now.
All I'm thinking is I don't want to deal with this or anything if either of his kids does something out of line since I know how my brother will react in the moment and blame us. Even if he says later he didn't mean it. So I still don't want either of them to come and stay without.
Edit. Just to be extra clear the niece that is having the baby is my husbands niece. She is also 16 and completely unrelated to my nephew.