AN, I’m sorry you find yourself in this situation, I can relate in some respects and wanted to add my $0.02 FWIW.
My WW had a ONS before marriage and a PA and a number of EA’s after marriage. We weee HS Sweethearts and each others first and only, when we started dating anyway. I discovered her PA through snooping her email. No way to talk her way out of it, it was black and white. She admitted the ONS the same night I discovered the PA.
She did things with her AP that we haven’t done, but also did things we have done, that are very typically for WW’s in affairs, I don’t need to get into details. Her AP pushed her boundaries and she happily obliged. When she told me about the sex, I was floored that she allowed this guy to do some specific things to her, quite degrading and unlike her. She said basically what a lot of WW’s do. She did it because he wanted it and she wanted to please him
About a year after dday, I asked her if anything we do makes her uncomfortable. She said the one thing she did with him and has done with me made her uncomfortable. Not because she did it with him, but more when we did it (post dday), she was always anxious about me thinking about the two of them together. It’s true, it would trigger me.
It made me very angry. This POS that had nothing to do with my life has now caused issues for my wife and for me. I thought about it for a while, and decided I didn’t want her to do anything she wasn’t comfortable with, so we don’t do this specific thing anymore. For me, it isn’t the end of the world, but I still don’t like the reasoning why. However, she still maintains that she is more than willing to do it if I want to. This does make it easier for me, since the AP doesn’t "own" this.
In terms of the why’s, this is something that I struggled with for a long, long time.
After a couple of years and countless IC sessions for my WW, her IC also brought up a lot of the same "reasons" as your WW’s IC did, for my WW’s affairs and how she acted during them.
At the end of the day, depression, FOO issues, being a people pleaser, etc., are all just reasons and justifications. My wife cheater in me because:
1. The opportunity was there;
2. She wanted to;
3. She did what she wanted to, without any regard for me or our family.
It really just comes down to this. My WW has made strides on her boundaries with men, worked on herself and her self esteem, and is a better person and wife. Is all better, no, her affairs are something that is in our marriage forever. I think about it everyday, and it’s been 7+ years.
As for the sex acts, I don’t see OS as being anything extreme. I see it as a standard part of sex. The dom/sub stuff, not surprising. My WW’s AP just wanted to see how far he could push my WW. She did everything he wanted happily. Maybe it was transactional, but so what, she wasn’t forced or coerced, he asked, she said yes, no different that your WW.
Your WW and IC hitting you with disclosure and setting boundaries doesn’t sit well with me. If it were me, I would be finding a different IC, as many have said, her IC is there for her client (your WW, not you). The "you won" statement would make my blood boil. She has a long way to go before she can become a safe partner that can empathize with your pain. She is not there now. She may be able to get there, she may not.