MIL lives in the same town as SIL. MIL used to live with SIL and her DH with the kids for years but now has her own flat. But inspite of all the free babysitting, school running, letting her older GCs move in with her for months at a time, SIL can't seem to think of inviting MIL to her house at Christmas. When we have christmas at home we always invite MIL. We are going to my parents' house this year and usually mum invites my MIL too but TBH she drives my dad mad (not very sisterly thing to say but she's a twittery woman) and it means someone has to go out of their way to pick her up and take her home as she lives 10 miles away from my parents.
Just had a phone call from MIL about presents etc and she asked where we were going on Christmas Day and I had to tell her. Cue silence and then 'Oh.... I thought you probably were'. Nothing I could say. I feel bad for her. Am I unreasonable to think that SIL could invite her to her house for lunch - she's not got any of the DCs on Christmas day and is feeling a bit sad about that. But she can't seem to see that her mum might feel the same.
I am not going to be involved - I am not! It's isn't my family but I think it's sad.