I'm sorry but I think it is. Did an assault happen? Yes or no is all that matters. If you are too drunk or too emotional to control yourself, that's on you. I don't care how much verbal abuse precedes it, these are supposed to be adults. Walk away or verbalize your retort. Physical contact is the line.

This is 5 year old stuff and I already do enough parenting. And now I'm paying for this behavior. No F-ing way somebody gives me a paid vacation for assault, why should pay for his?