This is such a long story so I will try to keep it brief....
My DH's ex has been trouble to us ever since I met him several years ago - unbearable at times, and after a recent episode, I did a bit of googling into personality disorders as I have always been convinced she has one. After looking at the traits of NPD, I am utterly convinced that she suffers with this as every single trait described fits her exactly ie. self-centered, no remorse for mistakes or misdeeds, projects faults on to others, no conscience, insensitive to feelings of others, easily angered, manipulative, twists conversation and if trapped, keeps talking or gets angry, tremendous need to control situations and others, hangs onto resentment, likes to cause chaos for no reason, moody, contradictory, draining. Obviously more but don't want to bore you !!
Does anyone have experience of someone like this and how best to deal with them? I find myself getting infuriated by the way she behaves and the silly accusations, remarks and threats. It is very difficult to ignore as she and dh have a dc together so they need to be in contact.