We are having a not-so-small wedding (~130 people) of close family, family friends, and close friends. The venue can't accommodate any more people. My grandmother is invited, along with all of her brothers and sisters who we don't see very often, but felt we should invite anyway. We did not invite all of their grown children (along with their spouses and kids), and my grandmother is very upset about it. She keeps making snarky remarks to me about it. Problem is that I don't even know who their kids are or what they look like, as I have never met most of them (and there are about 30 of them)! We can't use the "small wedding" excuse because my grandmother knows it's not, so how to we get around this?