My fiance and I decided that we did not want to have children at the wedding. Our reception is at a very fancy, non child friendly restaurant. We have already told multiple people that we weren't having children at the reception. My mom insisted that I invite her cousins to the wedding- I have not seen any of them since I was little. At my shower, one of the cousins asked my mom if she could bring her 2 adult daughters and ALL OF THEIR CHILDREN- that's 7 extra people!!! My mom said yes without asking me. No matter what I say, she won't back down and tell the cousin that we really can't have any extra people. Not only is the no kids thing an issue, this is an expensive venue with no discount for the kids food. My fiance's mother just found out and said "This will destroy relationships between me and my extended family"- we didn't even invite my fiance's teenage cousins. My mom has put me in a really awkward position. I am not close with this cousin and if I call and tell her that we really can't accommodate the extra people it will cause a huge fight between my mom's family. On the other hand, if I let them come, there will be issues with my fiances family. Any ideas on what to do? My mom and I already got into a huge argument about it and she thinks I'm being rude!