If I may ask your opinions on this situation to see if I am genuinely being unreasonable or if I just need to forget it as a nothing. It's not a massive thing by the way, just something that's mildly bugging me.
Went out for a meal with husband, MIL, husband's single brother and a few other more distant relatives, all on DH's side of the family for small family event. After meal had finished we were all in the car park mingling around saying goodbyes and a woman from another group came over to speak to MIL. She happened to be a friend of DH's sister who couldn't make the event. MIL and woman were chatting and I was stood next to them not speaking but clearly part of the group, while DH and BIL were probably two cars away. MIL pointed out DH and BIL saying, they are my other 'children' over there, my two sons, and completely blanked me.
I don't know why she wouldn't have said this is 'Poll' my daughter in law? She's always been a bit exclusive of me and I'm a bit sensitive to it.
What do you think? All of the other relatives were talking in different groups.