MIL has not seen DS ever since he was born. Its his first birthday on Monday. She hasn't sent him christmas crds or gifts etc and has been really disinterested. We had a little party for him yesterday, MIL was in same city (lives within UK but far away usually) but said that she was too tired to attend the party. She says she will come on Monday, his birthday, but I have told DP I'd rather she didn't, as I have made plans to go to the zoo, and for lunch and she will ruin it as she is not easy to get on with. She could come any other day this week.
AIBU in that if she hasn't bothered to see him so far it won't make any difference to her if its not actually on his birthday and that its not fair for her to dictate what we should do (she wouldn't go to the zoo and is, if i'm honest, not so much fun). DP wont tell her as he will be worried he will upset her. I think she has hurt his feelings and mine too, so I don't care.
When she does come round I'll make her dinner and be nice to her as always, I just don't want to entertain her and change all my plans at the last minute.
Also I know it makes no difference to DS that its his birthday, its more important to me (hes pfb :))