That is one of my favorites, too! The facial expressions are great, very dignified.
I wish I knew exactly which child the baby is -the baby's my favorite part. Mom & Dad both look so posed and proper and the little one looks totally unconcerned, even a little bored.
Yes, babies are blissfully oblivious to protocol. My favorite part of the picture is M-J, though, I think it's one of the most handsome images of her.