I imagine in their line of work there would be a lot of crossover? A lot of meetings, networking, etc. Escaping her entirely would be almost impossible I’d have thought.
It’s like you are both playing ‘pick me’ only he doesn’t need to as had both of you for so long. I agree with pp even if this woman moves on (probably the best bet).
I think the trust has gone from your relationship, this has been going on for such a huge length of time. You talk more about the OW than your DH. Do you love him? Does he love you and do you communicate this? Are you I intimate, is there mutual affection? Does he want to stay married? Not asking you to answer but to ask yourself and him these questions.
Ultimately are you happy to carry on as it’s easier, your lives are and finances are intertwined and wait for it to just fizzle out over time. It seems to have done just that in any case if she’s now moved away.
A word of warning, we have staff working past retirement, if they’re that way inclined it doesn’t end. It’s almost always men, especially if senior. I’m working with someone now, different organisation, who is closer to 70 than 60, has dealt with terribly ill health more than once but pulled through and who is still of this ‘tendency’ shall we say. Says marriage is over, just together for the convenience, separate lives, beds. I’m sure if his wife knew she was spoken of this way, she would be upset (maybe she would see it as banter, maybe it’s the truth, maybe they both feel the same, maybe he just overshares. I don’t know). He’s a lovely person to be around, charismatic and if we were both single, or if I were single, lonely with low morals I can see how things could start
I guarantee your DH has put time and effort in to his workplace relationship or it would never have happened and that means it could happen again with someone new. Even if it goes nowhere and is only emotional or an ego boost, it still hurts.
I’d heavily invest in your female friendships and make a life for yourself too, get out more without him.
Why did he start the affair OP did he ever say? Does he still love her OP? that’s the bit that would be the nail in the coffin for me. But I can still see why you would want to save what you have built. I don’t feel from your posts that he owns much shame at all?
Quick edit just to say for those saying he should be fired, it doesn’t work like that. Not unless there’s been a complaint from her in this case. I’ve seen it play out more than once, an affair is separate, unless it’s impacting work. The most they would do is have a word and separate them, if that’s possible.