A narcissist will lie about: WHAT THEY DID ONE SECOND AGO, WHAT YOU BOTH DID TOGETHER A SECOND AGO.
They want you to DISBELIEVE WAS THEY KNOW YOU KNOW WAS TRUE AND HAPPENED.
(i see this one A LOT with my husband. He will say "YOU NEVER TOLD ME THAT" when I KNOW THAT I KNOW I did)
They want you to LET THEIR LIE PASS AND NOT CONTRADICT THEIR FANTASY BELIEFS. If you confront them, they will CUT YOU OFF
They want you, their OBJECT, to be like a hammer or a doll, to do whatever THEY want you to. Eventually, they get you to the point of letting them have the LAST WORD, either on phone, online, in person...whatever...so that they BELIEVE THEIR OWN LIES BECAUSE YOU DIDN'T ARGUE BACK WITH THEM.
There is a situation with a narcissist, when, if you begin to react too NOTICEABLY to their lies and behaviors, they start feeling confused and upset, thinking "wait a minute! THIS ROBOT, PUPPET, DOLL seems to be THINKING FOR ITSELF. THAT CANNOT HAPPEN! I did not "order" this. I ordered a completely submissive creature and this one is starting to act without ME PUSHING BUTTONS. I CANNOT HAVE THIS!" (this is when devaluing and punishment usually begin)