The account leaves some question in my mind about what happened. It says she shot the attacker in the back, and the other one got away. This suggests that they were already fleeing the scene when she opened fire.
I certainly don’t criticize her for returning fire, but did this action actually save them from further attack? This is not clear ( to me ) from the account.
Not a lot of info but I disagree that the story would lead one to believe that she shot while they were fleeing.
It says that she shot one of the attackers in the back with her husband’s pistol, after she and her husband had been shot, and the attackers were struggling with her husband.
I do not see any inference that they were fleeing before she shot.