I am so very sorry this is happening to you. I, too, am in a 20+ year marriage, and never thought this would happen to us. I, too, needed the whole truth - even the nitty gritty details that were always preceded by, "I don't know how this is going to help" by my WH. I didn't know how it was going to help, either, but I knew I needed it. We are 4 months out from the first Dday, and 2 months out from the last one, and it's been a mucky road through gaslighting and trickle truth to now, when I think I have the whole story. I have stopped asking for the minutiae, although at times I do.
My WH wanted to reconcile immediately after being found out, but on his terms. He thought if he told me a smaller piece of the truth that we would have a better chance of reconciling. But once I was on to him, I turned into a fact-finding detective (and was quite good at it, sadly). I followed up on every small outlier to his story and most of them turned out to be the catalyst to more truth. I actually think he was trying to protect me, even though I told him, from the start, that all I wanted was the truth, and that trickle truth was the equivalent of death by a thousand cuts. It didn't matter what I knew I needed - he was full preservation mode.
Thanks to this board and these wonderful people, I took control of the terms of our attempt to R by demanding a full written disclosure in preparation for a polygraph. He went through with it (it took 2x), and in the process all of the remaining lies were busted (I believe - I don't trust him as far as I can throw him, yet).
I am in neutral gear, and will not wear my ring for the 2 years that he was with the OW. I am not going to fully choose to R until those 2 years pass, unless something else precipitates a decision to separate. All of have is my self-respect, and I will not let him tear it down.
In my opinion, If you both want to R, I believe that a full disclosure that you work through together with calendars and a laptop to look up info that is relevant, followed by a polygraph is essential.
This sucks so much, and you deserve whatever you need right now from your wife. Please hold your ground.
[This message edited by Elara at 4:39 PM, Wednesday, May 1st]