Your wife certainly has good form when shooting. I once helped a range officer teach a group of women how to shoot handguns.
Every woman who shot in that course would lean back in an attempt to get as far away from the firearm as possible.
It takes some convincing to get them to understand that they are in control of the weapon, and not to fear it. So, getting them to “step into” the proper holding position took some repetition.
Your wife was holding a very “casual” pose as she took a confident aim and squeezed off the shot.