Long story short, my brother had a child nearly 8 years ago and fell out with the mumi when the child was a baby. He's never wanted to know the child and expects his family not to either. I've tried raising the issue in the past but it's quite clear that if I try to get to know the child, it will cause a huge rift in the family. My brother now has another child who he is a proper father too and it just seems so unfair on the first child. I previously had no way to get in touch with the mum but now I think I've found out her address. I'm thinking of going and putting a Christmas card through the door and reaching out. Not sure if I should knock and try to reach out that way or what. I'm worried she might not want to know now anyway as I've already left it too long. AIBU? What would you do? I also have kids now and would like them to know their cousin.