It's like you can't understand films.

Well.. I think that was the point. Everything about their courtship/relationship was unconventional. The scene leading to the wedding is counter to classic film musical modes.
"I slept with you and you're in love with my husband. What the hell am I supposed to do with that?"

Am actually surprised there's not more posters on the this thread agreeing with you.
The middle of the night, dressing gowns, snowfalls; with the right couple, chemistry and dialogue it just may have worked. But with an alternating screaming and cajoling Jimmy and a perplexed Francine, all I can say is,
"P-u-h-l-e-e-z Marty , what were you thinking"?
IMO hideous!

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