we've accepted an invitation for dd to a party. about a week later she gets another one, same day, from a closer friend. the first party, unusually, is 4 hours long. 12.30-4.30. the second one is 2.30-4.30. would it be awful to leave the first one early and go to at least part of the second one? Both invites are from school friends so in part I'm worried about there being a mass exodus from the first party leaving some poor kid on her own. also I guess it's not really on to turn up late if there are any sort of activities arranged? I should probably just leave it at going to the first one shouldn't I?