Melanie's (ahem) Wedding Gown?????

What in the hell was that?  Are they kidding?  Is she kidding (or was she just being facetious when she looked pleased)?  Is Vivian crazier than any of us even imagined?  All Mel needed was a huge white bow in her hair, some tap shoes, and a lollipop and she could have been cast in the remake of Whatever Happened to Baby Jane! (LMAO)!!