Is it wrong that I'm not going to help my divorced brother meet his estranged kids? I'm married to his ex wife's brother and see them all the time.
Do you want your brother to see his kids at all?
No, he had a lot of pain in the process of making those kids with his ex wife. I'm sure they won't appreciate him anyway.
You should not interfere with the relationship that your brother could have with his kids. Instead, you should encourage him and support him trying to be apart of their lives. This will be most beneficial for the kids.
I disagree, I'm not going to do it unless he pays me.
Your actions are selfish and inconsiderate as you are thinking about what you can gain out of a serious situation. It's unwise to use this situation to take advantage of your brother. It's best if you just don't interfere with the relationship he has with his children.