My fiance and I decided early on that the only children that will be at the wedding and reception will be our 3 kids that are in the wedding party, they will also be leaving the reception that starts at 5 at 7:30. We have made it quite clear that there will be no guests under 18 (called the guests with kids, put it on invitations, put it on the wedding information insert that was included with the invitations....ect) however I have found out that there are guests that plan on just bringing their kids anyway because the whole mindset is that if they just bring them there will be nothing that we would do about it. I don't want to be rude about it, but I have considered asking them to leave if they show up, but my mother and fiance told me that I can't do that. What should I do?