So a friend is having a birthday party for her child and her child has chosen the friends they want to invite. This does not include my children which isn't a problem, even though they are close, my kids don't even know it's happening.
But now I've been asked to help out at the party last minute. I'm happy to help as we help each other out a lot, but it means changing our plans of going out for the day and my kids will probably find out about the party and they're too young to understand why they won't be able to go.
Aibu to be slightly annoyed and how can I tactfully let her know?? I don't want to hurt her feelings as she wouldn't do it intentionally but it will really hurt my child's feelings if they find out they weren't invited to the party.