Ex that he shares children with and will kick off MASSIVELY when he says that he has moved on.
How long would you be happy to be treated and act like the OW even though you werent one?
There is no one else, they are not back together, this is a fact that does not need to be questioned. I know both the man and the ex well enough to know that. Although whether he may be allowing the ex to do the pick-me-dance is an unknown.....
Genuinely asking for a friend who isnt on MN!