The talk was productive until it wasn't and everything turned on a dime.
I'd imagine this isn't the first time something like this has happened and I can assure you that it won't be the last. And that's perfectly okay. There's not much either of you can do about it but plow through. That may take a while in some cases. That's okay, too. This shit is fucking hard, man, as I know you're discovering.
I had very similar experiences. Sometimes a comment from my exww would trigger all sorts of craziness. It's difficult to explain. I tend to think I'm a normally rational person. At the time, being rational was damned near impossible. Too many powerful emotions easily triggered by just about anything.
The first is that I should have made the connection.
There's no way you could have made that connection. Don't blame yourself for that; it's not your fault. You were being open and honest, vulnerable and authentic, and that is never a bad thing. Now that this connection has been made, however, you still have opportunity to work through it with her, and that's a good thing, sir.
The AP was a former colleague and I think we trauma bonded during our time together on wall Street. We would talk about work with each other and my wife obviously feels like I turned to someone else because she and I did not talk about work.
Have you shared this with your wife?
The second is that I realized that any issues I ever raise will be seen through the lens of infidelity.
For a while this will be true. She will see you, everything you do and say, through the lens of infidelity. However, it doesn't last forever. Eventually, as she recovers and begins to heal, this will subside. IIRC, for me, that took at least 18 months after d-day.
Don't let this dissuade you. You'll be tempted to walk on egg shells. Try to resist that temptation. Most BS can be hypersensitive and hypervigalent, so any hint of trepidation on your part will not be well received.
Craziness, isn't it? And yet, its par for the course.
I do not know how to balance being vulnerable and authentic when something is weighing on me without triggering her feeling that if she had done better I would have not cheated.
If you figure that one out by all means share it! In the meantime, don't bother. I cannot for the life of me see any way around it. You're going to trigger her. It's inevitable. And while this may seem counter-intuitive, it's the best way forward, blowing up those land mines step by step.
It's like that children's book about a journey through the woods and swamps and whatnot. You can't go around the woods, over or under them. You have to go through them.
My exww and I had similar conversations about the conditions that lead to her betrayal. It took me a long time to understand that my tendencies to avoid conflict did, in fact, exacerbate her CoD tendencies without accepting any blame for her choice to cheat. Your wife probably isn't there yet and may not be in the foreseeable future.
Today has had lots of silence and I do not know how to explain my thoughts in a way that will not trigger an angry response.
Give her space and time. She needs to process her thoughts and emotions. You can let her know that you're available when she's ready. That's not being avoidant; it's grace.
Above all, be patient. I know you want to get through all of this as quickly as possible. We all do, wayward and betrayed alike. Unfortunately, it doesn't work that way.
It's a marathon, not a sprint.