The only rules there should be for firearms:
Never point a weapon at anything you do not intend to shoot.
Treat every weapon as if it were loaded.
Keep you finger straight and off the trigger until you are ready to fire.
Keep the weapon on safe until you intend to fire.
Know your target and what lies beyond.
...
If she didn't violate any of those......I don't see a problem.
True it is wrong, but legal permit holders have to set the standard. Ignorance of the law is no excuse. It happened to me once, had a 44mag and I was in Joplin, Mo with an Ok. permit.