Thanks, you just made my night.
A couple things....
I've taught several hundred people to shoot shotguns. Your Spouse will do better leaning into the shot a bit more. She's trying to balance all that weight out front by tipping back a bit. More practice using proper form will help her both in effectiveness and comfort.
The stock looks a bit long for her also. Taking off an inch or so and fitting a premium pad will work wonders.
And, this is the place for ultra light loads. 7/8 oz target loads are nigh optimum.