I own a massage table that has logged a lot of hours. After 90 minutes, you run out of other places to use your hands.Not so fast with your red pen there Barney Fife!
Your wife's limitation with hands is on where YOU want to put your hands. You can still use your hands to give her a back rub, legs, and feet. The idea is that you make her to want you to use your hands in other places but you don't.
How long do you wait to see if it worked? I might be impatient, but 35 years seems maybe enough?