If he has moved home and wants to make it work, I would think Retrouvaille would be very helpful. He would have to say that OW is out of the picture. But the weekend will focus just on the two of you. If he wants to let her go, this would reinforce his decision a lot. Limbo is right that they say there should be no other partners, but it is your definition of what that means. I would encourage you to try to get him there. It could really be the turning point that you are looking for.
