<will-bloggs-too>

I’m fascinated with the condition: some sources suggest that narcissistic personality disorder may be an infantile, defensive personality structure in response to abuse and trauma, usually developing in early childhood or early adolescence. They suggest that narcissistic personality disorder may be a maladaptive defense of the abused child’s or adolescent emotional splitting, resultant cognitive distortions, and negative/hostile worldview.

Sounds very much like my neighbor (Tammy) based on knowledge that I acquired while I was with her.