I knew someone who I have since amateur-psych diagnosed as being psycopathic in part (not a real diagnosis). I met this person while they were going through a divorce. We worked together on a few things for a while - charm and glib is a great description. But I noticed a pattern of having no 'old friends', and also appalling treatment of women that went far beyond what someone might classify as 'rebound behaviour' as behaviour that seemed to take delight in degrading women and a need to find friends who delighted in the retelling. I moved to distance myself from this person in an unconfrontational way - I assumed they could easily turn violent if provoked. In the end I was proven correct as they assaulted their own father in a disagreement not long after. I don't know what is going on now, as mutual friends who I knew have also ceased contact.
The twist in all this story is that the divorce was initiated by him, not his wife. She was a nice and very normal person, and to her, staying married and having a father for their child was probably more important. The point is that many people will try and hold a marriage together for all sorts of reasons.
I imagine that the spouses of psychopaths would give those kinds of explanations for staying marriedf they were asked. But a psychopath would seem to be a poor choice for a parent or a spouse.
The twist in all this story is that the divorce was initiated by him, not his wife. She was a nice and very normal person, and to her, staying married and having a father for their child was probably more important. The point is that many people will try and hold a marriage together for all sorts of reasons.