Background story as not to drop feed.
DS 4 and DD 2.
Known DP since we were kids etc grew apart went our own ways etc.
Was with ex many years and had DS. Ex cheated and left when DS was a newborn.
Got with DP when DS was 13 months old. Couldn't be happier he's amazing to my son and treats him like his own he adores him. Couldn't ask for more.
Fell pregnant with DD (a surprise, but very welcomed).
All very happy in our little family. The only problem is MIL. She obviously treats DS differently to DD and it's really winding me up. Not that it matters but my DS is an absolute angel such a loving sweet boy. It's really hurting me that she would do this. DP has mentioned it as really hurts him too but she denies it and causes arguments. I just worry now my sons getting older he will start to pick up on it.
AIBU to say you either treat them the same or don't bother with either??