Background: My dad grew up in Germany and is still very close with four couples (sibilings). Three of the couples have grown kids (all in their twenties) who are not invited. We do not have space, as we are not at fire code, but we are about 10 invitees above what the venue recommends for enough dance floor space. We also don't expect a whole lot of declines. The couples got STDs in October for our June wedding. About a month ago, my dad got a FB message from the 26 y/o daughter of one of couples saying she was excited for the wedding. Uhhh, she is not invited....Turns out the whole family including another daughter (24 y/o) booked flights already. The only non-refundable flight is the 26 y/o who is coming from Canada vs. Germany. They family has asked if they can all come. Invites have not been sent out yet.
Note: Budget is not an issue. Space is.
These are options that have come up, but I'm at a loss for what to do:
1) Just let them all come and address the invite as such. Issue is that the other siblings will not be allowed to bring their adult kids. I don't want to start a chain reaction. Also, the problem is the room is already sooooo packed. And while the fire code allows 40 more people, the dance floor gets cut down, and no way I'm having tables moved to allow dancing.
2) Address the invite to just the parents, and tell them, I need to wait to see how many declines I get to see if we can fit the girls in. I don't really think this is B-listing, since the girls are not invited. It would be more like accomodating.
3) Just say no. And tell them to eat the ticket. Issue here is that I think this would hurt my dad's friendship with them.
4) Allow the daughter(s) to come in the parent's place. Only one of the daughers has the non-refundable ticket.
5) Some other option.
Please help! I'm open to all ideas that will help me deal with this tactfully and also keep my dad's friendship okay while still being able to breath in our venue.