My stepmum's b/day is a couple of weeks (it's a big one though she doesn't want a fuss made, ie. no party/surprises etc). I rang my dad to find out what she's doing & he said they are going out for a nice meal and her 2 daughters plus their partners & kids are going too. I feel a bit upset that me & my family haven't been invited. I don't think it's that she doesn't want us there, I think they genuinely haven't thought to ask us. I'm sure if my dad had mentioned it to her she would have said yes as I love her to bits even though we're not especially close. My partner said maybe it's cos she'd rather have her daughters there but it's not like there is a limit on numbers and it would still be a small, intimate get-together. AIBU?