We've had a trip planned for months. It's to go to a specific event, I.e. there won't be another opportunity.
Friend has just messaged to say adult son is planning a birthday party for his wife that evening, so friend can't come. Apparently friend has only just been told. Event is in 2 weeks.
I know family is important, upsetting DIL can be a bit of a minefield (although they don't seem to have that issue here) but AIBU to think that if someone invites you to a party with 2 weeks notice, they'll have to accept you might have plans. Or are parents, even of adult children, not allowed to have plans?
Would you have cancelled for DIL's birthday? Should I be all understanding or is it reasonable to let them know I'm not entirely happy with the decision?
FWIW it's quite a niche activity, there's not someone else who would want to come with me.