Yes, she used a lethal weapon to instill fear. That seems like abuse to me, NO MATTER what the husband may have done in the past. I am not saying that either is right in their actions, they are both guilty parties so far as i am concerned.
One can argue that there was no need for her to fire the gun in the first place because he had not abused her and as such she was not a victim in that instance. If the issue is that the husband put years of mental abuse on her, then she should have fucking left, not let it build up to the point where she just pulls out a gun.
Fantastic attempt to twist some words on the racism point, lol, quite clear you are not worth debating with. But you are ABSOLUTELY right, if there is no harm t body or property then there cannot possibly be a victim.