I think the problem I and OMW will have is that they have been emailing from work.
Jemas:
You have enough to go on.
1. Confession of inappropriate communication (Hidden)
2. Locked Cell, changed Passwords (Hiding)
3. Meeting in MI. 9Sorry, but I bet they spent some 1 on 1 time) Why else would she suddenly call you from afar to tell you she can't go on.
I'm sorry but I'd treat this as a PA. Even if not an EA is JUST as damaging and tough to break up. Especially since they believe they have done nothing wrong by nit sleeping together, and this makes it even tougher to establish No Contact.
The same thing happened to me.
Some telltale signs:
1. does she hover over her cell? Always have it with her, not available to you?
2. The establishment of that emotional "wall"
3. Secrecy of her communications.
Right now you need to assume they are in contact DAILY. and by now, that you are discussing your knowledge of her affair, she is probably in lots of contact about that.
My wife lost her cell phone during her affair and could not wait but 4 hours before she bought a new one.....it was found 2 days later. She began locking her phone with a pasword. Used the computer at night and in secrecy. It was not untill I was able to get online to look at the account did I know contact was between 10 and 30 TIMES A DAY!
This is addition attacking the core of your family and values.
EXPOSE NOW. Take no prisoners, this is real and 90% sure that there is a lot more to it by now than you know about.
I'm sorry you are here, but you must do this. Expose and work on yourself.
My wife and I are in recovery now, so do not lose hope.