Dh and I have been together since DD was 1. DD is now 6 and we have two more children, sons ages 6 months and 3 years. MIL is a bit of a strange woman who always favouritised DH over his sister, to the point it gave his sister emotional problems. She used to show clear preferential treatment of DS when he was a toddler until I made DH tell her it wasn't on... She hasn't done it for a while but we have just got back from visiting her and it was rife. I can be quite sensitive about the issue so was unsure if I was imagining it at first but DH has just told me he noticed it too. Fortunately we don't see her very often, about 4 times a year but even so it bothers me. DD calls DH dad and he adopted her at the age of 2 so MIL should treat her as an equal grandchild surely?!
Aibu in thinking this and should I ask DH to speak with her again?