>If anyone is interested in this sort of preparation, I'd recommend taking a $50 intro flying lesson or - better - signing up for the AOPA's "Pinch Hitter" course, which is designed to teach non-flying spouses of pilots how to do just this. It's saved a surprising (alarming) number of lives - a lot of private pilots are fat old men who get heart attacks.

I suggested this in another comment, but I wanted to thank you for mentioning it as it should get more visibility.