I'd love to hear a more savvy person lay out the "right" way to deal with this situation.

I'm sure I would assume that someone would catch the mistake very quickly. Probably as bold as I would get is paying off the mortgage. If the bank unwinds that, then I'm just back where I started.

If it went on for a few days, I might get a little bolder, but I don't know how much I could get the wife on board with. "How to get your wife on board" would be an entire separate topic.