I remember a story of a colorful NFL player going through a formal receiving line at a White House function I believe and coming upon Sandra Day O'Conner says, "Hi Sandy!"
I believe it was Mr. Riggins who said "loosen up Sandy baby" at the Washington Press Club's Salute to Congress black-tie dinner.
Growing up around the military, I always called my friends' parents, Col and Mrs. X (being an army command, they were almost always Cols.). Twenty five years laters, we are still friends with at least one pair of them. They would come over to game night and the like with other friends. I didn't pick up on it but they were introducing themselves as Jack and Jill to everyone else. When I was talking with some of them later, I was talking about did you see how Col X did that? They looked at me blankly until we made the connection that Col X is now just plain Jack. Old habits die hard.