I needed somebody I could trust to act as a sounding board for my feelings. I can't do this alone.
Unlike some of us, you don't have to do this alone! You have a WS who is ripe to doing it with you all the way, in fact she has done all you have asked, including some of which I and others consider overboard -- but we do understand the overboard as we have been there too!
When my wife said she could go out with whomever she wanted and I couldn't stop her, I trembled, I was angry, and I said you do then don't come home! All that did was shut her down permantly. My point is your anger, both of your pain (trust me she is in great pain too), the betrayal, the trauma, that is normal and the emotions are understandable, but just as she is accountable for her actions, you are also accountable for yours! I say that as I wish I hadn't said what I said, that is on me, I should have said lets talk about this, but my emotions got in the way, still do as she continues to see OM (since divorced).
What I think about is 30 years of marriage -- do I want to throw that away? We had a great marriage and relationship except for this. If you want to toss 27 years way, basically a third of your life, that is your business, to me a third of my life was too precious to just simply dump on the junk pile without trying to first see If I could make it work. If my wife displayed the same remorse as your wife, I would actually be happy as I would know I could.
Another thing I think about is me as I was honest, understanding, happy, entertaining, outgoing, lovable guy ... why should I let what her do change me? Ow trust me I feel the same as you, wondering if the past 30 years was just one big lie, wondering if I should have a DNA done on eldest son as we had some issues at that time and he isn't like "me". But you know what, I'm not going to let my emotions get the best of me and change "ME" -- I'm not going that ogre that I feel like being. When I think of being the ogre, I think of my wedding vow, what I promised, to love honor and cherish -- that wouldn't be honorable nor cherish. I also think about to forsake all others -- that means you don't let any others come between you and your wife, not you parents, not your kids, not friends -- it means NO OTHERS. Ow yes, I understand my wife did that, I understand I feel revengeful, but I don't need to be a lessor person so can't let my emotions turn me into a lessor person (irrational behaviors), I must let logic and reason (rational behaviors) dictate my course. By so doing, I will rest in peace knowing I did all I could to save the marriage, that I didn't fail my wife, my family, and I can take great pride in that.
I read the thread with interest -- you wife was opposite of mine as she accepted her actions as wrong, she was remorseful, she told you everything (no TT for you), nor gas lighting, the continued relationship, nor the continued deceit, the lies of omission or half truths, then blame shifting, and I could go on. While know one will say the PA is a good thing, it is over in your case, you have the truth, your wife is doing all you ask so you can heal and move forward. Ow I do know what it means to heal alone -- you are not in that position, yet! Of course you can't change the past, but you are in a great position for the future as you and your wife are in a perfect position to heal together and R ... she wants to, she is willing, the question is do you really want to end the marriage ... It will be you ending it!
Someone posted earlier that most affairs are the result of problems in the marriage. what I have read leads me to a great many great marriages never ever thought a affair could even remotely happen but sh#t does happen -- no marriage is immune!
The way I see it, yea, you can get out of marriage and no one will blame you due to what happened, particular if it was a bad marrage as you found the excuse you were waiting for. OR, if the marriage is overall good, you can R, be the hero (certainly is isn't her right?), have even a stronger marriage, and prove to your wife you are the understanding loving person she married, in turn, your wife will show you she *IS* also the person you married -- she has a real need to do so!
BTW, IMHO, everyone makes mistakes, you have, she has, that is the reality. But what is important is how couples work through the mistakes. You can take what I say with a grain of salt, don't care as I'm still dealing with the sh#t and frankly would rather be in your situation then mine -- almost jealous! I believe the folks here are trying to be being truly honest, because they have been traumatized being on the opposite end -- they know how it feels! They are offering up their experience, it is golden, feel fortunate you found SI! They are only trying to help and support those going through what is likely the most difficult time of their lives, because they have and they know! Bottom line is they want nothing more then to truly help you through this!
Lastly, sorry so long, but I needed to give perspective (hope I did). I do wish you the best of luck in whatever way you chose -- it is your choice and the one you have to live with! And sorry as nobody should ever have to face such trauma! Good luck!