my fiance and I are paying for the wedding. we decided not to have children at the wedding. The only children at the wedding is my Fiance 2 nieces and a nephew, and the ring bearer. when we address each invitation we purposely put Mr. and Mrs. We got a response for 5 people. the 5 people are 2 adults and 3 kids. How do I tell them nicely that their kids are not invited.