More of a wwyd than an aibu. I am a ftm planning a first birthday party and in need of advice from more experienced of mums!
DS birthday is February so no chance of a bbq outside (would be my ideal preference) so we are hiring a small soft play area suitable from newborns.
Just wondering though. What do I do about older siblings? For example one friend is a week older than Ds but also has a seven year old big brother. Do I invite both?
Secondly dh's family are the kind who wanted to invite everyone and their dog to our wedding. I really want to keep it small, so do adults without kids or with grown up kids expect to be at these things? Even at a child's play area?
Dh brother is in his thirties, married and not close to us or Ds at all. Do I invite them along? Mil will likely kick up a storm if not. But I don't know if it's weird to invite them to these sorts of things? 
Thanks in advance!