Today, 5 days after our RSVPs were due, I got a response from my FI's neighbor, whose invite was addressed to her and her husband, for them and 3 kids. How do we go about this? For starters, my FH and I don't even know these people, so the fact that they are bringing 3 kids really puts me off. I also recently got one for a family of 5 RSVPing for 6, for a daughters bf. My own family asked if the could bring boyfriends, and these people just add on extra guests without asking?? UGH people are so rude. Anyone else having/had this problem?