No one interaction is going to make much of a difference one way or the other. As long as OM is involved the relationship is going to be toxic *and there is nothing you can do*
All you can do is tread water and not make it worse, which is intensely painful. You need someone to talk to 24x7 who's going to be sympathetic -- do you have anyone in mind?
You need to take your focus completely off of her for several weeks. I would go for minimal contact, as minimal as possible.
Acc
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015