Is it ok/healthy/productive, over a year and a half later, for the person betrayed, to regularly bring up the affair to his/her partner, repeatedly go over details, dates, events and state graphic assumptions about what went on between his/partner and their lover if the couple is supposed to be "moving on"? Thank you.

No, after it is discussed and settled, it is not talked about again.

If the person who cheated keeps bringing it up, they are just trying to hurt the other person and not really end it.

What if she continues contact with him after the affair and want to friends.
How should I feel, should I accepted and be quiet and continue like nothing happened?