Narcissistic Personality Disorder and Lies: The attitude of the narcissist towards lying is very childish and simple: If the narcissist lies and gets away with it, (s)he interprets this as being clever and superior to others. In this sense, while common sense clearly sees lying as a social ill, the narcissist views lying as an excellent tool to obtain what (s)he wants and as a means to demonstrate how stupid others are.
The narc will never stop stepping over your boundaries. For as long as allowed to they will continue to do so with utter contempt for your principles. The only way to stop them is to cut them out of the equation of your life. It can make the narcissist angry. That evil narc is beneath the level of contempt. Void of understanding and empathy. They just don't care who they step on and hurt in the process.
It's no wonder your son hates you John your a fucking manipulator and a lying coward day we met I'll give you five mins to explain why you made jade believe I had manipulated Joe turner in to opening mail when you know I had no idea it had been and John when you lie to my face I'm going to hurt you so much I'm going to show u the meaning of pain your a rotten bastard of a man