DD's birthday coming up soon. She said she would like to go to local trampoline park followed by lunch with her best friend. As it would be nice to have adult company, I thought I'd ask friend's mum (she's a good friend of mine) to join us for lunch, or the whole outing if she prefers. Trampolining costs about a tenner per child and I'd obviously pay for that. Adult spectators are free but we'd probably have a coffee as we watched.
My question Is, would it be the done thing for me to pay for lunch for all 4 of us, or should the bill be split 50/50? Alternatively, should I pay for the friend, as DD' s birthday guest, and expect her mum to pay for herself? I would add that I don't drive and, although we could go by bus, it would be easier by car. I thought I'd ask if my friend would mind driving, at least back from lunch, if not to the trampoline place too. It's all very local so not too much hardship for her I don't think. We wouldn't go anywhere too pricey - likely a chain restaurant like Bella Italia or Prezzo.
Sorry to ask but I always feel awkward in "Who pays" type situations so want to get it right!