Some women do not know that they are dealing with a Narc (Narcissist). They mistake his behavior for just being who he is. In a sense, they are right, he is exposing himself and she still has no clue of who he is behind his mask. Narcs are mistaken for egotistical people when it is so much deeper than that. Narcissism (Narc) is not rare, it is just never talked about.
Have you ever dealt with a man who throws tantrums whenever he is confronted? Then he turns around and manipulates situations. He gives you the silent treatment when he is mad. He always lies, and it seems like the truth will kill him. He is prideful and stuck on himself. He will talk about you to other people to make himself look good. He always likes to be the center of attention. Is he materialistic? Is he always cunning and sneaky? If he has quite a few of these traits, there is a great possibility you are dealing with a Narc.