For the life of me, I can't figure this one out. I have three adult cousins (siblings) who all live with their parents (two are in college, one is preparing to move out of the country). I'd like to invite them all with a plus one (no one is dating anyone).
I know the general rule is sending a separate invite to all guests over 18. I've also seen a few etiquette websites saying if the adult lives at home they can be included with their parents. In this case, do I have to send 4 invites to the same house? There's no good way to write this without looking stupid:
Mr. and Mrs. Uncle and Aunt LastName
Cousin, Cousin, Cousin
Guest, Guest, Guest
What am I missing?