I also took my wife on two trips before she decided never to go again. They both happened the same weekend: her first and last trip.

It was a mixed group I was leading, with (I suspected) more than one hidden agenda. Her friend, who had never backpacked, told her to go - "we'll have a great time." I told her I didn't think the trip was for her. Naturally, she listened to her friend. To make a long story short, I ended happily sleeping under a tarp with a buddy (she and the friend used the tent I had packed in) listening to a gentle rain in the early morning - to be fully awakened by a boot in my shoulder and the endearing words, "Get me the h*** out of here." I did.

I feel your pain.