Teaching Your Spouse How to Pull a Trailer

the question is, how do you go about teaching your wife how to pull a trailer and how to back it up with out ending up in a divorce?

Most importantly, she has to want to learn.
Once my wife acknowledged she wanted to learn, I taught her over time while traveling. I would say out loud what I was thinking at the moment, such as "approaching right turn so setup wide left" and ask her to watch the trailer in the right side mirror while I make the turn to observe the tracking. "Notice how much room we need to miss that curb?" Whatever the situation was, I would just say what I'm thinking.

As far as backing up, we went to a large college parking lot. I did it a few times, again, just saying what I'm thinking. After doing that a few times she did it several times. Sure she screwed up, mostly over correcting, but I assured her she can't damage anything and tried to make it fun. I learned something here from watching her. With steering wheel straight and hand at 6 O'clock, you move your hand in the direction you want the rear of the trailer to go. While backing into the final approach, if you have to move your hand beyond 3 or 9 O'clock to correct your angle, stop, pull forward and try it again. Otherwise she would zig-zag her way back trying to get everything aligned.