Okay here's one. One of my guests whom I'm close to mentioned that she preferrs to be referred to (as a couple) as Mr. John Smith and Ms. Jane Smith. Their children are also invited to the wedding. So the outside envelope would say Mr. John Smith and Ms. Jane Smith, but then how would I word the inner envelope? Like this?
Mr. and Ms. Smith
Bobby and Sally
Is that right? 'Mr. and Ms. Smith' looks odd to me, but 'Mr. Smith and Ms. Smith' looks odder.