I am one of the years later folks. I count myself as 2 years out (when I found out) as opposed to 9 years ago (when A occurred). The trauma feels just as extreme as if you walked in on him (but how can one compare). I knew a teensy amount 9 years ago (basically just that it seemed his secretary was hitting on him). But, at that time I was distracted by fighting to keep our family together because there was a "threat". If I had found out then I think I would have been focused on keeping our marriage together. I had little kids then and that would have been the focus.
When you find out years later there is no serious concern over trying to save your family, I think mostly you want to leave. You don’t have the drama of knowing you must watch out for your spouse continuing their A. You are just hit with the pure unmitigated horror of the A having occurred. But there your spouse is, sitting there like a completely normal person, because after all 20 years have elapsed (9 years). It is horrendous. You want to kill them and yet there they are, a person who seems to have been faithful for the 20 years following the betrayal. Who the hell is this person?
I am so so sorry. Please be kind to yourself and gentle with your feelings. Ask/demand what you need.
There is the added complexity that your spouse also thinks they are the good person they have been for the last 20 years in your case (9 years in my case). They don’t fully understand why you think they are a monster. Because after all they have not been for many years. You have to be mad at the “old them”, but who is that? When exactly did they switch over from the old them to the new them? And you want the original offender standing in front of you where you can hold them accountable.
There is a feeling that they "ran out the clock". The information was kept from you until a time where you could be made to feel unjustified in your anger. Friends and family, if you even tell them, will not understand why you are so disturbed by something so long ago. Also, as you said your H’s A was "brief" (same here), so that’s another reason you may feel your feelings are out of proportion. You will have to process this in a very individual way, be your own advocate. Even therapists will have trouble understanding what you are feeling.
Resentment. That becomes the bogeyman. Because even you will start feeling bad about being so angry about something so long ago. But if you keep your rage inside yourself, unexpressed, it will only breed resentment. You have your work cut out for you. Two years after going through something quite similar we are just crawling out. Barely, but it is looking like we may make it. But at any point in the last two years I would have said no way. Anger still surges now, but it is definitely more subdued. I can "ride the wave" and it passes. I have taken my H through hell and back to be sure he was truly remorseful after all the years of lying. I hope your H has not done what my H did and engaged in thousands of discussions over the 9 years about my suspicions and lied straight through every one. He has had a lot to atone for. I give him credit for the fact that he is still standing. If I were him I probably would have walked away.
This is an honest assessment of how challenging a problem this is. I hope you will not be disheartened, but it would be a lie to say this "finding out years later" thing is an easy thing to get through.
[This message edited by Stillconfused2022 at 3:04 AM, Saturday, August 17th]