Wife is cheating, am sad but confused?

[HopelessInLove]

Well this morning was tough.

I had to pick up my kids and take them to where they needed to go. Dropped off S first. Then had time with youngest D. She took out a pen and paper and was drawing. She was explaining the picture to me. She drew 5 clouds, and I told her that they were beautiful clouds. "They are of our family." She had me the largest and on top with my W's cloud under and the kids right beside. D said that she missed me at home and that W and I need to stop arguing. I told D it was not that simple.

Then I thought Yes it could be.

Any feedback on exposure of A? I tried once before when though EA was going on, which IMO sent it underground. If I were to expose, give ultimatum, and go dark (already started to detach anyhow) what might be response with W? Just looking for opinions. Not looking to do this if at all or any time soon.