HC, as I was reading your thread, I was getting more and more angry. Not at your wife, not at her POSOM. At you. And not about you not taking more decisive steps to get out of infidelity and give yourself more chances to save your marriage.
You see, I'm one of "I wish somebody told me" ones. And let me tell you - I despise those who knew but decided to keep quiet. In my eyes they are close to the cheaters themselves, because they knew about the crime being committed and kept silence.
Do you know what you are doing to that poor woman? You are robbing her of the right to make informed decisions about her life. You are helping AP (serial cheater), to keep her in an abusive marriage. She is sitting on a time bomb. Her WH didn't have consequences for this A, he definitely didn't have enough consequences for his first (or N'th) A. He will do it again (or is already doing it). Maybe next time he will get STDs from some whore OW and then pass it onto his wife. And will be too much of a coward to tell her, so when she finally realizes she has it, permanent damage is already done. Or he will fuck OW without condom and will allow his W perform oral on him in the evening. The ways for him to abuse his BW are limitless. The probability that he will stop doing that on his own is close to zero.
So, good luck trying to convince yourself that it is OK not to inform OBS. That it is OK to let other person suffer abuse just because you made up some rationalizations for yourself not to do the right thing. WSes in wayward section are quite experienced in this.
Now, I will tell you about probable outcome if you gather courage and tell OBS. Since this is not his first A, OBS might have set strict boundaries (at least for herself) and will be divorcing him. Yes, that's what you fear. He will be totally free to pursue your WW. There's a good probability that he will do it just out of revenge, because you informed OBS. So what happens next? He contacts your WW with the news (limitless possibilities to do that even if he is blocked everywhere), your WW suddenly realizes that she can be with her lover, her rainbows-out-of-his-ass-unicorn soul mate serial cheater. And she leaves you. OK, no. She doesn't leave you. You beg her to stay (BTW, that's what you are doing now), you walk on an eggshells for the rest of your life. She stays with you, but secretly laments her lost love and feels growing resentment with you, because you robbed her of the chance to ride into the sunset with him and live happily ever after (until he cheats on her/she cheats on him, but that is another story). In 10 years she finds another (or N'th) soulmate and divorces you.
OR.
You expose to OBS and whomever else you choose to. You say to your WW in no uncertain terms that she fucked up everything, and if she wants to remain married to you she has to roll up her sleeves and start working on proving that she wants you and only you and that she is safe partner to be with. That she can stuff all her feelings for AP up her ass and that it is her shit to fix. What happens next - she either does all of this or doesn't, so you leave her. Assume she starts fixing her shit. AP is single again, starts pursuing your WW. She tells him to go fuck himself. She fights for you. She fights for your marriage. She becomes person you are proud of. 10 years later she can look proudly at herself and say - "I almost lost it all, I almost lost this future. I was stupid. But I became strong. This is the life I built myself for me and for you, I treasure it, I will fight for it, always".
So, choose, which wife do you want? And don't fool yourself that you are on a path to 2nd version.
And some final points. In your first post you claimed that they didn't have intercourse. I was "ok, possible, but not probable". But once I heard that he is a serial cheater, "possible" became "impossible" (unless you have recording of them definitely NOT fucking, unless you have pages and pages of their conversations how they wanted each other but couldn't go through because of their strong morals). He came to fuck. She met him to fuck. That's what cheaters do. It maybe was EA for her. For him it was "ok, some nice words and she will spread her legs". If you have only her words, 99% they fucked. Anyway, "foreplay" means PA. Not that it makes any difference on how you should proceed.
I realize that this kind of post is more fitting for JFO. But, sorry, I haven't seen anything that would indicate any R is going on here.
ETA, realized that OP is married for 20+ years. In original post it was "15 years and 3 kids later she finds another soul mate...". I figured that it probably doesn't apply.
[This message edited by DarkHoleHeart at 3:12 AM, July 17th (Tuesday)]
@DDay#1:
Me: BS, 40; Her: WW, 32
M: 10y, in relationship 15y, 3DD (8,8,6)
Dday#1: Oct, 2016, Dday#2: Jun, 2017
AP#1: COW PA, AP#2: EA/PA 3 months, AP#3: COW PA
Currently (2024): Plain of the Lethal Flatness