Either way, he’s a sick man. The lines between the classic psychiatric definitions tend to blur a lot, and however you want to label this guy, he is clearly not driven by integrity or conscience. I would bet that he has manipulated those around him for years and years. I feel sorry for his wife.
So don't feel sorry for his wife. She knew exactly what was going on and was most certainly getting her own piece on the side. They will do whatever it takes to get information, advance their agenda. "Love" and "Marriage" is just a scheme to these people.