As far as the cockroaches go, now that you know, if she continues to meet them, likely you will pick up on it sooner rather than later. There have been other threads here like yours, but not that many. But there is an addictive behavior of it, and the wives in the other ones did get emotionally attached to at least one of the guys. Thus the mythical infidelity "closure" that ends in sex and more meetups.
I think your wife will have anger and resentment for you for stopping her relationships with these guys. They are part of her life now. She is attached with varying degrees to each of them. She doesn't want to just end. It is not logical, but that is a feeling.
Raising my hand one of those (bold) that have BTDT.
I can tell you this from my experience:
Your WW may have not been "happy," but it wasn't because of you, or the kids or anything else. It was because she has this hole inside her that she tries to fill with external validation. She is getting that from the attention of other guys.
(You even said she told you this: "that I wasnt giving her the love or attention she needed" What is enough? Had you said "I love you" just one more time she wouldn't have cheated? Ten times? a thousand? Do you see how this is an impossible goal to hit? That is a moving goal post, that she can always say "You missed it. Not enough.")
She has figured out that she can trade sex for the validation ("you're hot" "your amazing" etc.). In her mind, its a cheap deal, and one worth doing.
As wk55 said, where there is one, there is more. That's because she's been putting out feelers to every guy she's met. Most guys probably don't respond, but the one's that do...
Look back. I bet you'll see that your WW likes to flirt a lot. Always talks to new people at the bar (most are men, right? - Common statement: "I just seem to get along better with men."). Those are the feelers. But that takes work. She's got to go out, met a dozen guys just to find one that will bite.
But dating sites? Craigslist? anonymous hook up sites? Holy shit! Life just real easy for her to find her fix.
And as others have described it as addiction behavior, I agree. Like the alcoholic who started with a little beer/weed (flirting), that eventually stopped giving her the validation. So it became liquor (sexting), then pills (sex) then heroin (hook ups with random guys in the bathroom, off the internet). As Axel said, "I used ta do a little but a little wouldn't do, so the little got more and more"
(once, with my WW's 1st OM, I asked why she did it? why him? Her response, "Because he said I was hot." Me: I say that all the time. Her: But he wasn't you.
See, she needed/wanted a bigger fix.)
Your WW has very deep mental issues that she needs to work out before she can be a safe partner, or engage in MC. She needs to understand what broke inside of her, AND FIX IT, before you can think of R. Does that mean you have to file for D right now? No, but you need to watch her ACTIONS very closely. Like any addict, they will straighten up for a little while, but without true change, will revert right back to their bad ways.
ETA: I just read your WW's post in Wayward. Everything she's described about her looking for validation and the ease of getting it on the net is what I described above. She needs IC much more than MC (as do you). Good luck.
[This message edited by WornDown at 12:05 PM, January 3rd (Tuesday)]