DD1 is 4 and about to start school. At the new parents' evening in July I got talking to a mum of another girl who will be in my dd's class (Girl A). They live in the same road as us so we've met up a couple of times since then, though our dds haven't particularly hit it off (mostly played separately and didn't interact much). DD1 has been invited to this girl's birthday party, and I told the mum I thought dd1 would be able to come.
Then this evening, I got a phone call from the Mum of one of dd1's friends from preschool (Girl B), inviting us to her party which is on the same day at the same time.
I suspect that, given the choice, dd1 would prefer to go to Girl B's party.
However, Girl A's Mum invited dd1 first, and I did tell her we'd probably be able to come. So, am I obliged to accept the first invitation that was given (and perhaps not even mention the second invite to dd1), or should I give dd1 the choice of which party to go to?