We have decided to have an adult only wedding which we communicated with most of our guests with children over a year ago - including one of the groomsmen who is coming in from out of town and has a 1.5 year old. Now that our wedding is 2.5 months away the groomsman is refusing to attend the wedding if he can't bring his child, even though we have offered to arrange a trusted baby sitter. What do we do? If we allow him to bring his child do we have to let everyone bring their children?