I separated after 40 years. Just after our separation, STBXH told me that the day we met he 'knew' he had to destroy me.
UNtil our separation, I really had no idea, the pressure was getting to him, and he started to boast in a strange way, giving loads of hints about he'd managed to fuck up my life without me realising. Totally without empathy, turns things around to be about him - my failure to orgasm became not a source of sympathy for me, but an angry outburst from him that I had no idea what it was like for him not to be able to satisfy his wife.
DD is also completely lacking in empathy. In the past she's deliberately manipulated someone at school who didn't like her and didn't hide the fact to become her friend. Her next step, announced very calmly and in a detached manner as if totally rational was that she was going to destroy this girl.
AFter a 'stress cure' in a clinic, she announced very calmly to me that she was going to push me to commit suicide to prove to the psychiatrists that they were wrong to discharge me from the clinic.
At the time I left, DH had been banned from the premises due to agression - an agressive alcoholic - but it would seem to be a case of like father like daughter.Obviously the strain for him of living a lie for 40 years got to him. I changed £100k of life cover to benefit him instead of DD, and in the month before we separated he asked me 4 times if the cover was valid in case of suicide.
Don't know if he's narcissistic, sociopath, psychopath or, maybe just a 'fucking nutter'. I'm well out of it!