Wife drops gun at McDonald’s and shoots husband

Gun in schools.  What could possibly go wrong?
Oh right. This:

Carney said a preliminary investigation revealed that Richard Lee Cooper, 47, and wife Barbara Annette Masters, 48, were sitting in the restaurant’s dining area when Masters leaned forward and a the gun fell out of her pocket and hit the floor.
The impact with the floor caused the gun to go off, with the bullet striking Cooper in the abdomen, he said.

“I said no mustard.” 

The police are charging the woman with “third-degree assault and reckless endangering.” But does that mean she loses the gun? I’d be curious how that works. Do you lose the right to own a gun after you pull a stunt like this?
I was intrigued that the article quotes a cop offering “the four cardinal rules of gun ownership,” but seems leave out “always have the safety on.”

Carney later offered some reminders of “the four cardinal rules of firearm safety:”

Treat all firearms as if they are always loaded.
Keep your finger off the trigger and outside the trigger guard until you’re on target and have made the conscious decision to shoot.
Never point a firearm at anything you are not willing to kill or destroy.
Always be aware of your target, the backstop, and what lies beyond.

I’m curious whether the gun could have gone off if the safety were on? The article doesn’t get into this point, whether the safety was even on.
Regardless, what is she doing with the gun in her pocket, where it can easily fall out? She could have killed a random kid. And what if this were a school? Yes, let’s have even more guns in schools so some of them can fall out and randomly kill innocent kids.
And one final point.  You lose your Second Amendment right when it impinges on all of my other constitutional rights by killing me.