Very basic.
1 child from a previous relationship, 2 children with DH.
DC1 has no paternal family at all.
DH family treat DC1 like they don't exist and shower DC2&3 with attention, gifts etc.
I've previously stated (with DH in agreement) that they either treat all DC the same wether that's a treat for all or none. (We're not the type to get upset if they chose none, this isn't a material issue.)
This is still happening though and I feel it needs to be readdressed with them AIBU?