The MC saying let go of the past and focus on your goals is correct per se but still so very very wrong.
Imagine you are in a boat that leaks. Your MC is basically telling you to keep on pumping water out of the boat instead of stopping the leak. Granted – IF you were on a leaking boat – chances are you would have to do both. You would need to pump and once the water gets down below a certain level you go try and fix the leak. If you only pump then at best the journey on the boat will be slow, sluggish and hard with the distinct possibility of eventually sinking.
If the affair is ongoing then that’s not only akin to the boat still leaking. It’s your wife pouring one bucket of water inn for each bucket either of you might pump out.
It’s also true that if you only focus on fixing the leak (focusing on the past) the boat fills with water and sinks. You need to pump a bit (focus on the present – the marriage) to make room to find and fix the leak.
I would use that metaphor with your MC. Ask him/her how you should be able to work on a marriage if the other partner MIGHT be putting as much effort into killing it as rebuilding it.
Have you looked at gmail? There are password recovery tools redux for forgot passwords, usernames and so on. Your wife can find the password and access that email account if she wants to (and she probably is…).
I am a firm believer in truth and reality. I would suggest the following:
Make it clear to your wife that nobody is forcing her to remain in the marriage. You realize it isn’t perfect and that you have your part in the marriage being like it is. You are willing to work on things but ONLY if both of you are committed to make it work. If she doesn’t believe it is possible or if she is doing things that have no place within the marriage then it’s better to be honest about it and start the work of terminating the marriage in the fairest and most amicable way possible. So if she states she wants to work on the marriage then she better commit to it.
Her decision to have an affair was wrong no matter what. You could be the husband from hell but that would never in any way or form justify her actions.
Then make it clear that as long as you suspect the affair of being ongoing there really isn’t much hope. Whatever effort either of you put in is wasted by your suspicion (if she is being honest about NC) or her ongoing contact with OM (if she is still in contact with him).
Tell her what you think is required so you are calmer about NC. Ask her what she suggests. Her “promise” isn’t good enough. Ask her what assurances she can offer and be realistic on what assurances are valid. At the end of the day then IF she wants to break NC she can and she will and you won’t know about it.
Really hammer the point that you aren’t forcing her to remain in the marriage. If she really is so unhappy and really wants to remain in the affair she is welcome to it. But not as your wife.