Update:
I have been working on my to do list...
First I needed to have resolution on the BestFriend of Edith's. She is a 30 year friend and the godmother of all 5 of my children. BF had 5 incidents related to WW's affair:
1) WW was out of the country when OM sent her an email to our family's computer. WW called BF to go to our house to pick up the laptop. She did and became a party to the hiding of the affair.
2) She told WW that she wasn't doing anything wrong. WW used these words to justify to me that OM and her were "just friends". WW continued her EA with BF blessing.
3) BF was to be the chaperone for my WW when WW went on a trip out of town to OM city to visit her cousins. MIL was supposed to go and at the last minute couldn't. BF went instead and let WW meet up with OM at a hotel at 11pm.
4) BF and WW were going to a party. They went to the party, but left shortly thereafter to go to OM's concert where he was playing a song dedicated to WW. This was an elaborate deception that was only found out when I got an anonymous tip that my WW was seeing the OM.
5) WW and BF went out to dinner with a common guy friend from high school. After dinner and guy friend went home, they went out to a dance club where WW ended up having a guy chase her into the bathroom. WW ended up staying out all night.
So, I decided that she is NOT a friend of the marriage. She might love my wife and children and she might even be my friend, but often when there is smoke and fire, and she's standing there.
I wanted to discuss this with her, so I sent her an email requesting that we talk about it together sometime. She responds "No thanks -- it's not appropriate to discuss your private life with me". With that response I thought, "Well, I don't think WW can have her as a friend any more and she needs to go NC with BF."
So I discussed it with my IC. IC recommended I handle it like this:
She said that regardless of what BF says or does, Edith has free will and she did not do anything she didn't want to do. So instead of insisting NC on her friend of 30 years, which she thinks would put Edith over the edge, that I do this:
"Edith, I am not comfortable with you and BF being alone. Due to the repeated deceptions, I don't trust you spending time with her alone."
If she gets upset I can say:
"I'm not making you do this, but I can't trust you with her."
"These are the consequences of your actions. This is the byproduct of your deception, with which BF was involved."
"I didn't make those decisions, you did. If you want to be upset with someone, you should be upset with yourself".
I am very comfortable with making those statements and telling her that I am not comfortable with her being with BF alone any more.
I will not be the one restricting her actions. I am establishing the boundary and she will have to decide if she respects it or not. If she choses to violate my boundary, then we will be right back to talks of separating...
Additionally, the IC recommended a polygraph tester in my area that she trusts for infidelity type questions. She said it was important to have experience in that type of questioning.
IC also recommended IC for the children at the appropriate time when we are ready, but that it might be good for Edith, I, and the children all do it together instead of always being in camps.
So, I'm moving on down the list... Thanks for all of your help and encouragement.