Very often the best – maybe the only – thing we can do is the things within our control.
Like if you got a hurricane warning then no amount of worrying would prevent the hurricane from possibly hitting your area. You can’t avoid that. What you can do is prepare your home, have a safe place, tie down valuables, stock up water and food, charge batteries and phones and so on.
To me this is a comparable situation. Your wife is having an affair. With the number of texts, the window of opportunity, and the plans to hook up that evening to have sex then it’s logical to assume some form of intimacy has already taken place.
Your wife – she has asked for time apart and refuses any known or acknowledged path to end the affair. It’s sort-of like an alcoholic who demands a stop at a bar on his way to an AA meeting.
Crux of the matter is that nobody is forced into a monogamous marriage. If your wife want to be with this man, she can. You can’t stop it or prevent it. Lock her up? You are breaking the law. Beat some sense into her? Guess who’s going to jail. It all boils down to us all being free to decide what we do – even if the decision is a stupid one.
So she’s the hurricane. That’s the best way to view her. The next days determine if and how hard she will hit. You can’t control that – but you might be able to impact her actions by doing the equivalent of boarding your windows, storing valuables and stocking up on necessities.
Tell your wife that you can’t stop her from seeing OM, being around OM, going to the gym and pining for the OM or whatever. She can leave the house and have her time apart if that’s how she thinks "saving" the marriage looks like. You can’t prevent any of this.
But... not as your wife.
You had this great epitheny that while she’s having her affair (and call it an affair) then at best you are sharing her as a wife, and you don’t share wife.
You are not forcing her to be with you, to remain married. Instead you are giving her the freedom to do what she wants
Tell her that this is not what you want or expected. When you married you committed for life, but her actions show what SHE wants, and you are not forcing her to remain married. Losing her is the lesser pain compared to sharing her. It gives you a known path out of infidelity, and you aren’t hanging around in pain more or longer than you have to.
Therefore – to all form and actions – you are simply viewing the marriage as over, and all that is left is the emotional and practical detachment.
Let her know that you are setting off out of infidelity. For some relatively short period of time she can tell you that she too wants out of infidelity AND this marriage, but that the further you go on your path the more you accept the inevitable, and the less inclined you will be to work on this marriage.
IF she wants this marriage there will be some requirements, like total accountability over what happened, total enforceable NC, a new gym, IC, later on MC and so on. Not forcing anything on her – she is always free to chose if she wants the marriage or not.
No drama. Just facts. No sobbing. Once this speech is over go make a sandwich. Or leave the house. There isn’t really anything more to be said.
Others have suggested you let the OM wife know. I want to support that idea. Don’t let your wife know, don’t go all dramatic. It’s just a call or some reliable form of information where you simply state what you know:
"I think you deserve to know I found over 1800 texts – some very personal and of a sexual nature – between your husband and my wife. I have reason to believe they have hooked up or had plans to hook up."
That’s it. No expectation she believes you or anything like that. This will most likely result in him dumping your wife like a hot potato and focusing on his marriage. It also creates a sense of reality for your wife – the affair is real, the consequences real, the impact on others real.