Very sad!

Hi guys need some advice. I am expecting a little boy. My brother passed away 10 years ago and I've always said that if I have a boy I would name him after my brother. Now my suster is making a big deal out of it saying why am I doing that because every time she is going to see my son she is going to be sad. And that he can't replace my brother. I just thought it would be nice to honor him and now I am getting shit from my sus. So sad just wnt to cry. 😭