I know there have been lots of posts on here about whether or not to invite kids and what to do if families RSVP that their kids are coming when they weren't invited, but I have a bit of a twist to throw at you. I chose not to invite any "kids" under 22, mainly because I need to keep my numbers down. My uncle just emailed to say his wife probably won't be able to make it but he's thinking of bringing his daughter instead. Personally I don't care in the sense that his daughter is about 12 so she's perfectly capable of behaving and hanging out with adults all night, and this situation would not increase my guest count because his wife wouldn't be coming. My only concern is that it would be unfair to the couples who were not allowed to bring their kids (and unfair to the older uninvited "kids" themselves). What do you think? Should I tell him it's fine? I would feel bad insisting he come alone if his wife can't join him.