I would NOT recommend ANY shotgun with only a pistol grip and no stock, for a beginner like the OP's wife, who already has problems handling the recoil of a standard stock, full size shotgun.
http://www.youtube.com/watch?v=EgwCOdBdS64
http://www.youtube.com/watch?v=77cst8nB7Sk
http://www.youtube.com/watch?v=EgwCOdBdS64
http://www.youtube.com/watch?v=77cst8nB7Sk