Why
The ‘why’ question…endless and unanswerable. Whatever answer comes up always sounds so pathetic because it can in no way justify the A (and people are deathly afraid that it might).
If you can’t exactly and precisely answer why and how the affair hurt you so deeply, it really is unrealistic to ask them why they cheated. I will say, though, that wherever their desire to cheat and your pain from it come from, they come from the same place.
What you can productively ask about is the facts of the affair. If they give you those facts and you reward them for it (don’t use them as wedges for future attacks) then you will likely get more. Their openness and willingness is something happening right now, too, not something 20+ years ago.
My experience when all of this got churned up again…I told my wife that at the time I caught her and ever since, that she had only ever shared the bare minimum, only ever confirmed what I already knew. Now I needed to know more, I needed for her to tell me facts that I didn’t already know, or I’d be fine going our separate ways.
None of my questions were about feelings, just dates, times, numbers, firsts. Could her answers be lies? Sure, although it’s hard to build up a web of bullshit and not have holes in it. And more importantly, with my questions about the long ago past I was really asking questions about what was going on with us right now. Today. This minute. Are you with me or not?
The actual answers didn’t matter, it was how they were given to me that mattered. I focused not on the answers, but they were given. I watched her. Was it like pulling teeth, or were they provided, reluctantly of course because who wants to admit to being a horrible person, but with an understanding that they were helping? Right now? And when we got to that point, I found I didn’t want to know any more facts, because I knew the answer to the question, are you with me or not?
It also helps greatly to get to the point where you are absolutely ok with or without them. Don’t telegraph the answer you want to hear, just ask the questions.
when I look inward there’s simply an endless, silent void
I can bet the void she saw looking inward during the affair was a yawning abyss of moral nothingness. So she probably didn’t look. She probably turned away. Who would ever want to see that truth? Take the easy path.