I'll go a step further: just buy the gun that you want
There's no way I'd get my wife to the range in the first place to let her "try before we buy." The local ranges are full of ninjas shooting shotguns, ARs and Garands at 15 yards. I can feel my shirt flutter when they open fire! It's the surest way to get my wife spooked (YMMV.)
So if she doesn't like your choice, keep the gun for yourself (after all, you know you'll like it) and pick out another one for her!