Favoritism

C

Anyone deal with parents (or in laws) who show favoritism to certain grandchildren?

We live with my husbands parents and we have 2 children. My SIL also lives with them and she has 1 child. My mil is always holding my SILs baby and hardly ever talking to my 2 children. It’s really upsetting and hard to see. My son used to be super close to her and now, he doesn’t really have anything to do with her.