Missing,
Read again what M1965 & Bigger stated above. I feel, based on what you have written, you are still in a fog of your own. You are partly suffering from “Hopium Addiction”. Your heart still is clouding your judgment, and after your fog clears you are going to have to deal with a great deal of anger. Oddly only a small part of the anger will be what your wife has done to you, but the greater part is when you will realize what you did to yourself by how you waited for things to happen, instead of actively working getting the A to stop, and moving out of infidelity.
When she comes over and acts like nothing is going on, that is an illusion. She is feeding you crumbs; you need to stop taking them. What she is doing is abusive; she knows damn well what she is doing.
You’re holding on to the small sliver that you can R. If you had wanted that you would have gone to HR right before she even “tried to call it off” with her friend/co-worker. Yes this guy is a shark, yes he knows precisely what strings to pull, but she is the one that took the bait and ran with it.
Sadly that opportunity is most likely vanished, that chapter has closed; I really am sorry for your loss. The longer an affair goes on, the worse the fog/addiction takes possession. This meeting you are having today, start now to write down your questions. You don’t want to get caught up when she rebuffs/sidelines your questions and you forget to cover all the information that you need to know.
You need to see what she has become. The wife you thought you knew (PRE-Affair) is probably not there. What is there, is someone you don’t actually know. Sure she looks and acts the same, but she has been replaced by the WW. Do not trust what she says. She is actively and openly cheating on you. Recognize it for what it is.
The stone-face you saw when you start asking questions that indicates you aren’t buying into her fantasy; that is the real her.
The one that actually knows she is hurting you. A person cannot have an A and not know they are hurting the BS - Not unless they are amoral or sociopathic. So she creates an illusion to herself, at first that is her actions happened because of you. Now she has moved past that to the fantasy world that you are somehow OK with her “I am not living with OM” affair.
This PICK-ME dance you are doing will cause her to lose complete respect for you. This wait-and-see game you’re playing will cause huge damage to you. Once you realize and accept this, (which from what I see, isn’t 100% by the way you are responding here), will require a huge amount of time to heal from. Months from now, you are going to hate yourself for allowing the pick-me dance to go on as long as it did.
Missing, value yourself, ask the questions M1965 requested. Watch her reaction, note all the responses “I don’t know”, “I need more time to get my head straight”, “I know, I just feel so bad for what is happening”, or “I need space/time to find out where I need to be in my life right now”.
Her deflective answers will indicate how much she values you and your marriage. Once you see her response or the lack thereof, you need to get on-board with Team MH2, pull the plug on this charade.
BTW get proof that she is living with him. After the D, go to HR and blowup their world. After all she didn’t make a mistake and neither did he, this was a conscious act. Why should they be allowed to get away with it.