This is actually very common...
takes my new Ruger 9MM and shoots my azz off! She NEVER shoots. Would rather set a spider free than step on it. First three shots from my P95....bull.bull. and damn close. She actually squeals and giggles after each 10 ring!!! I got no problem admitting that I suck, but I try. She walks up and smokes the center...and then says "that was fun!". I am no Pro, but I do practice and my Lady shrugs and walks away....ARRRRRGGGGH!
Hate it when that happens.
Same thing for me. .38 revolver, .22 ruger, 9mm, doesn't matter. I shoot about 100 rounds a week, trying to improve and then my wife goes to the range with me once a month and shoots lights out. I lover her going to the range with me, but I wish she wasn't quite so good.
Be thankful that she can handle and shoot a handgun!! When you are out of town, not home, in need of backup....or unable to fight (wounded, killed...etc) she will be able to have the basics to fire and hit a target.
Just my $.02