With a cap, you will never have to move someones refrigerator.
With a cap, you will never be able to move your own refrigerator.
I am happy with both of the above statements.
I recommend doing as your wife says. Then when your wife asks you to pick up the new refrigerator. Calmly explain to her why you can't.
Actually most shells can be easily removed. But keep it a secret. I actually have a system to remove my old six pack shell by myself. Just bend over inside the bed using your legs to lift the shell slightly moving it in steps to its balance point. When the rear is on the ground. Go to the ground and Continue to move the shell back off the bed a small distance at a time.