We have told OOT guests with kids that the wedding is child-free over the summer and it was understood. Since then my friend and FH's cousins wife are both due in May and they would need to travel to attend. If they bring their babies with them we will not be able to accommodate them because some people think child-free means just kids and babies are the exception but they are not to us. I've been trying to find a sitter who can watch the babies so we can refer them to our guests if they make the choice to come because as much as this sounds harsh we don't want any kids/babies there. It's been hard even finding someone. At this point I'm thinking if we can't even find someone local to refer to guests to use they should stay home. We understand some people don't want to leave kids, much less babies, but we want our wedding entirely child-free. We are not going to make exceptions to anyone. How do you politely say to someone their baby is not welcome in keeping with a child-free wedding?