My friend, I am NOT an advocate of reconciliation. Quite the opposite. I think when you've seen behaviors like this....you've seen what this person REALLY IS or what they have become. Your wife has gone down a path in life where she's allowing the worst in her to come out, and that sounds like a careerist. Someone who is putting her career and that includes the boss who can help her, instead of you and your marriage. The career is exciting and interesting and all about the great ME, and the boss enhances that, he's powerful and can help her advance and makes her feel so top of the world, and you can't compete with this. She'll try to make it sound like she's building something for the two of you, but that's just self serving bullshit. Realistically, and I am ALWAYS a realist....you can't compete with this drug. What you are seeing now are her values, her behavior reflects her values and morals. She may try to lie about this at some point and try to say he pressured her or seduced her or some bullshit like that but the reality is....THESE ARE HER MORALS AND VALUES IN REAL BEHAVIOR AND REAL TIME. Not just whatever crap she professes publicly or in front of other people.....this is the real thing. Do you want to be with someone with these values and this behavior? Do you want to be with someone who treats you and your marriage like this? Do you want to be with someone who values themselves and their "career" and the boss who can help her and pumps her up over loyal, loving YOU? DO you want to keep sacrificing for this and finding excuses for her? NO YOU SHOULD NOT. You need to stop making excuses for her, and stop saying that you understand this vile behavior or how she worked so hard for this....yeah, she's working hard under HIM to get ahead. I've seen this several times in my life and these are the values and morals that some people have. She's doing what she can for HERSELF....not for you, not for the marriage. And this eventually comes out in other areas of life too because....THIS IS WHO THEY ARE AT THE HEART OF IT.
As sad and devastating as this is, she has made the decision that her career and this relationship give her more than you can. She's a user. Maybe she wasn't always like this, but given an opportunity....this is part of who she is - it's what she chooses. That's the reality. And if you keep kissing her ass, you just degrade yourself and she will keep doing this. Even if she stopped it temporarily, she will start back up again or maybe she'll go on to a new job and a new boss....BECAUSE YOU HAVE BEEN GIVEN A RARE OPPORTUNITY SEE WHAT THIS WOMAN IS REALLY LIKE.
And even if she gave all this up (she won't) would you really trust her again or love her like before? No, you won't. Most people don't and you are not going to be an exception. THIS IS WHO SHE IS. Will you love or want her like this? That's up to you but this is what you've got and it's not gonna change. You have to decide what you want for your life and your partnership.
If you decide to stay, recognize that this IS what she is like. I cannot emphasize that enough. This is not an anomaly, you actually ARE seeing a deep part of who she is, what she wants, and what she values. This IS real and it's not temporary.
This is a moral decision she has made that benefits herself and I say....this woman has always put herself first and you've probably kept your eyes closed and tried to see the best in her or the situation and STOP DOING THIS! Allow yourself to be angry. Allow yourself to be disrespected. Allow yourself to say I'm not putting up with this, I want a better woman who feels and values me and the things I do. Because THAT'S what you should do. If you decide to stay, for whatever reasons.....recognize this is what you have. And this is what you'll keep. Even if the situation changed...she won't, and you WILL remember. It's just goes underground.
I would recommend you see a lawyer, start working your way out of this relationship for whatever legal ties you may have, give up this pretense of recon or whatever bullshit people imagine this could be, and accept the reality that she went down the wrong path voluntary and it's where she wants to go. Don't make yourself LESS. Don't accept disrespect or bad treatment. Don't make yourself Number 2 in anyone's life. Just exit stage left....most of the time, it is, alas, the best answer. Don't worry about her bullshit any more, don't obsess over it, don't try to get her out of it, don't worry about her feelings, stop mourning the past or what it was or what you think of her....YOU CAN FIND SOMEONE ELSE - YES YOU CAN. Unless you're 80 in a wheelchair, you can find someone else who will treat you better and that should be your goal. Live your life with pride and make your planned exit. Get an STD test and go to a lawyer, start any processes you need to. And keep going because...she's full of shit, and IMO, that doesn't empty out completely. It just fills up again. YOU DESERVE BETTER - MAKE IT BETTER!!!