Know about her experience, I would trust her to have the finger off the trigger in that photo. She probably just finished the shot and is coming off the trigger when the photo was taken.
I used an Army simulator when they first appeared on the scene. The rifle I was using had a damaged front sight. Some years later, I went to another event and it seems they had the exact same simulator set up. The rifle still had that same damaged front sight.
I was just commenting that firearm habits instilled are habits carried for life. No matter the weapon.