I just read an article that I’m going to post here soon(with permission of the author). Narcs push their partners to become involved in deviant behavior so that they can use it against them. You will find yourself doing things that go against every fiber of your being , to please, and placate, this person that claims that they “love you”. Maybe it’s doing drugs; maybe its bringing other people into your sex life. Whatever it is, Narcs will convince you that you have to do this to make the two of you special, and connected by participating in the weirdest crap. What they are really doing is humiliating and debilitating you. Then the Narc will use it against you, and tell the world that you are the one that corrupted him/her. What the Narc is doing, is setting you up to destroy your name and self esteem. I know, I’ve been there.
Just remember, you’re dealing with a really sick person that gets off on destroying you, and creating chaos everywhere they go.