Don't sweat it, I got this!
She's telling you off so she can have more freedom with the OM and avoid feeling guilty thinking maybe you'll give her the fight she's looking for and be the one responsible for the divorce (at least in her mind). So give her the freedom she's asking for and the silent treatment right back.... and follow her direction about dating. Women can't stand it when you agree to the silent treatment.
She's trying to control you by setting harsh boundaries to keep you from chasing her, but the wayward spouse is often hypocritical to their own advice. She actually want you to chase her, it makes her feel good to see you beg her, and she knows if you do she can secure a place if she ever decided to come back. Don't don't chase her anymore!..... start spending your time with other women, divorce groups, early morning gym classes and such.
You see the adulterous wayward spouse can't stand to see you lose interest in them because it creates a fear of loss, the same fear of losing something precious you're going through. And by following the 180 stopping all needy actions you're really throwing a wrench in her plans. All you have to do at this point is get out of the house and spend time with other women a couple days a week.
I know you don't want to risk cheating, neither did I and stayed faithful to my marriage, so that's where cooking and dance classes are perfect.... really anything where can you make small talk with women will help you see how
your wife doesn't deserve your affection right now.
BUT Sally from yoga needs a male friend to talk to, since her gfs keep filling her head with "go on girl" false hope, and want's someone to listen to her. More women than you can imagine appreciate the listening skills you learned in marriage. You're not there to fix them just listen. AND no emo divorce talky or they walky, OK.
Before you meet in counseling I want you to do whatever you can imagine to distract yourself from this whole problem and cheer yourself up. I don't care if it's watching the three stooges on your smart phone or sucking down half a helium balloon and singing in your car, just cheer up first.
When you do sit down in counseling and she starts b!tching about what a terrible person you are..... AGREE 100% to whatever she says and be sincere. "I didn't realize how controlling I could be. I can't control this situation or you W, and while I would like to save our marriage it's impossible. We'll finally do what you want and end this thing."
You know she's just blaming you to avoid taking responsibility and trying to force it on you. So take it, act "as if" you honestly accept this, and agree with her 100% with a sigh of relief and a smile on your face. This will completely throw her off and take away the stick she beats you with all at the same time. But like I said before she will need to see you prove this and you can't ever go back on these words. You take her down to the court house and give her the damn papers.
When you stop calling or chasing her through divorce, going dark for quite a while, don't be surprised to hear from her to A) ask if you're single, B) p!ss you off, C) try to get you to chase her, and D) ask if you're ok and why you're not calling. All of this will happen even after divorce, though some time much later after her freedom gets old. There's more to here which the 180 guide covers most of.
Don't even bother worrying over the affair. It's a rebound affair if I ever saw one.... so he's going to be put on a show of how he's better than the ex she gaslights and will do much better if only he could have her. Ever get a question in the middle of the night asking if you married for all the wrong reasons? He was the reason why. It's possible he also pressured her to get a divorce, though it's not always the AP, and her freedom date is something she's really looking forwards to so they can be official.
Again don't sweat it! He'll do just fine blowing it without your help when all his bullsh!t lies turn out to be just that, bullsh!t. It's simple bait & switch and a favorite tactic of losers, like the ones that chase affairs and break up marriages. Give him and her enough rope to strangle their love.
Now you have a lot of things working against you and need to be prepared to go through with divorce. That's ok, many women who dream of better life after divorce (with or without the AP) later regret it. Who else do you know is going to put up with the woman you did for so long, after the sex stops and the nagging begins? Something like 80% of WAW regret divorcing for an AP anyways.
Later in the future after you've taken time to heal you can start working on contact to see your son, but be prepared for her to act stingy and keep a close eye on you. That's OK, you'll just have to prove yourself to her first. You will anyways, but here it's special simply because you and that child of yours will develop a bond that any OM can't replace.
Over time you can steal her away for friendly dates taking the child to events..... this of course shows her A) you are a good father after all, B) you're no longer controlling and very agreeable, C) you've changed into someone she can respect, and my favorite D) makes the OM so jealous of your dates that
HE gets controlling and blows it with her.
You just watch buddy. You have every capability of becoming the OM to her, or the
BETTER MAN, and this scares the sh!t out of the guy she's with because he secretely knows he
CANNOT replace you in her mind, all the firsts you had together, your place as the father, and keep you out of the picture no matter how much he complains.
Keep your head up!