I am thinking mb28 that you may want to pack some things.

Make sure he knows you do NOT WANT a divorce, but that you can't be around him or this messy affair any longer. Tell him he's hurting you and his children and you need to take you and his children further away for their own good until he makes a commitment to clean things up.

This is something I did in my home and it worked really well... I made sure she knew I didn't want out, but that i couldn't be around her anymore... so I brought home a stack of boxes and started putting things away...

She was all over it trying to talk me into a fight and panickign..i Just kept packing...

You really need to distance yourself now I think... there's a storm happening on the OW's end very likley... and he is going to take it out on you...

Don't be there for the fallout.

Has he accused you of exposing his affair again?

if he does I would give him this :

"I have not exposed the hurt the two of you are inflicting on innocent people. If her husband were in front of me now I wouldn't hesitate to tell him the truth that he has a right to know. You are attacking someone's home <insert your H's name here>. I haven't had the time to expose this sleazy thing but I would not hestitate to do so. You sleep with another man's wife and you have whatever's coming to you <insert your H's name here>..."

"This affair is coming to a head soon and I don't want to be around when all that hits the fan... YOU own that so YOU are gonna have to deal with it... please leave me alone now"