Unfortunately, not everyone has the best relationship with their mother, and sometimes, it's because your mom might be suffering from mental illness that makes it hard to get along with her. If your relationship with your mom is questionable, there may be some signs your mom is a sociopath. Although the personality disorder isn't terribly common, if your mom has exhibited some alarming tendencies in the past, including extreme lack of empathy, it may be the case that she has this particular mental disorder.