All of our friends are in the wedding party (we're new in town, so we don't have many), so we have no one left to be ushers. I thought it would be neat to have my FI's childhood baby sitter and her husband. They're like a second set of parents to him. It would be a nice way to honor them since they're like family. But my FI thinks it would be weird to have 50 year old ushers. He thinks they're supposed to be about the same age as the couple. Any thoughts?