Can always count on you to bring the apples when everyone else is discussing oranges...
Did you see the part where she and her boyfriend were fleeing in HER TRUCK? That's when hubby caught up to them, so she took her boyfriend back to his house ~ where he got his gun and shot the hubby.
Muy interesante.
It's not any different than if he'd had his pistol with him and started firing out the window at the husband out on the public road.