Leaving is the most high-risk time for anyone leaving someone with NPD. These types see themselves as virtual "Masters of the Universe". They "didn't give you permission to leave" is their mindset.
So you have to be extremely careful.
Know the time of the seasons. Superbowl Sunday has more domestic violence than any other day. Most shelters are full.
This is why I think it afflicts more men than women. That testosterone thing. That "I'm President; you're Vice-President-IF you're lucky" mentality.