The ex-Narc's persistence--he just doesn't stop trying to have his way

NC is impossible. The ex-N just doesn't stop trying to have his way, to act like nothing is wrong betweenus. At work, he keeps asking me questions in front of other people, Striking up conversations, and saying hi and goodbye (of course, only when his current OW isn’t there). That is his typical m.o., triangulating the woman and me in his perverse little office game.

But he just took an overseas “business” (that is, “for sex”) trip with a co-worker. He covered it up, but I know. I’ve tried to avoid him and haven’t accepted his offers of help with my projects since he came back (he started with me the day after he got back).

This deceitful trip was the last straw (and we are talking two years after our break-up). I truly don’t want to associate with him anymore. He knows I’m avoiding him but won’t let up. It’s like he thinks he can do anything and still talk to/engage with me like everything is normal.

I’m so aggravated and on top of it have to watch him now play with his new toy at work, and hide it all from the office and from his current girlfriend.

I’ve stayed away from work where I can, but as soon as I’m back he’s “working on me” again.