How to Tell Whether Your Partner Really Is  A Narcissist?

A client asked me the time honored question: “How do I tell whether or not my husband really is a Narcissist?” As she spoke of him two different images emerged: on the one hand, the smart, charming, graceful social operator; on the other, the irritable, petulant, irrational domestic tyrant. But, she wondered, di that domestic behavior make him a Narcissist? Or did it point to her woeful inadequacies as his partner?