You will have to gauge this one, since I am reccomending NC, I don't fully advocate this, but you ARE taking his calls, despite our advice so... lol

If you CAN and the timing is right, you want to get a point in again about you insisting he have NO CONTACT with OW. He needs to keep hearing that, THIS resonating in his mind may lean him twoards ENDING his AFFAIR instead of FILING for DIVORCE.

I suspect he's already tried and the OW pressured him back into the affair a few times already. He sounds quite mixed up.. she's really messing with his head.

He does need to know quite CLEARLY that you do NOT want this OW to be at ALL INVOLVED with your family, him, OR your children at ALL EVER in the future... he needs to know how firm you are on that... I suspect he DOES, but I don't know how emphatic you have been about getting that message across yet...

your call, but keep that message coming too... if you HAVE to contact him, I don't reccomend it.