Did she say what I think she said??? Spoilers
Beware....Spoiler Follows
At the very end of the movie, as the 2 couples are driving away in the taxi, they are watching the dogs out the car windows with Errol Flynn and Olivia de Havilland watching out the back window and Rosalind Russell and Patric Knowles watching out the two side windows.
As the four turn back to into the car, laughing, Flynn grabs Olivia, says "Darling" and they begin a passionate kiss as Russell and Knowles shout objections. Flynn and Olivia break apart, look at each other in puzzlement, and then Flynn says "Sorry, Pal", as Olivia gets up to go to Patric Knowles and Rosalind Russell moves to sit on the back seat with Flynn. Both couples begin to kiss.
As Olivia is climbing past Flynn and onto Knowles' lap she says "My mistake. Bye, Errol."
Flynn's character's name was "Bob". She called him by his real name of "Errol"!