I sounded out family about this party in January, they all know the date of his bday and I said the party would more than likely be the sat after. I really wanted my cousin's daughter to come, we've made the effort to get to all her parties (100s of miles away). But she has apparently got another party to go to so can't come to ours. AIBU to be a bit miffed? They never mentioned another party back in January