My ex was incredibly promiscuous and consistently unfaithful in every relationship she has had. She expressed to me multiple times that she didn't feel bad about cheating, and that she did not have feelings like a normal person in general.
Her dad left her mom when she was like 7 for a younger, hotter woman; he had a stroke a year later and has been an alcoholic ever since. Her mom is currently in remission from breast cancer, which she was diagnosed with when my ex was like 9 years old. When the mom was diagnosed she told my ex 'I have cancer and am going to die'. All her relatives aside from her parents are dead from various cancers and heart disease.
I read a paper once that linked adulthood promiscuity and general cuntiness like my ex displayed to some kind of mental health diagnosis. Anyone know what it would be called?