"Also, why is it me finding books to help the betrayed spouse?"
I believe that highlights what has been wrong with the marriage. GF, you have been making a ton of effort in the relationship, probably from the word go. You work hard to provide a home for your wife and kids. You don't cheat, you don't drink or do drugs, you don't want the kids to see you and your wife arguing. I am sure the list could run for several pages.
You have done everything you can to protect the marriage, the home, and the kids. You are clearly a pro-active person who takes his responsibilities seriously and, if you see a problem, you will take action to solve it.
You are hard-wired to be a great provider and defender of the family. And because of that, you will do your best to 'save' the marriage on your own, even if it means that you have to buy the books about how you can be healed. The same way you would fix the front door if it was falling off its hinges, or patch a hole in the roof.
Unfortunately, your energy and dedication to the family has meant that your wife has grown used to not having to work, taking you and the marriage for granted, and spending a lot of her time thinking about herself. She can, and will, continue doing that as long as you are running around doing all the work.
As part of your efforts to save the marriage, you will try and find the best possible motives and reasons for your wife's actions (including giving credit to the idea that your wife and the OM were victims of 'abandonment' while they were actively having an affair behind their respective spouse's backs). This may make her actions easier to live with, but it can also prevent both of you from addressing the real issues that led to this situation.
If you continue to make all the effort now, you will set a bad pattern for the future. One person alone cannot carry a marriage, particularly if their spouse is actively damaging and sabotaging it. Think about it: over the past two years, which of you has made more effort for the marriage and family? You, or your wife? And now, after the storm has hit, who is making more effort? It's you, isn't it?
Gator, I know you are doing it with the best intentions, but what you are doing is writing your wife a permit to continue to do what she has done for the past few years: sit around feeling sorry for herself while you do the heavy lifting. You say that one thing you want to do is identify what 'drove' your wife's actions and see if those drivers can be remedied. As I see it, a big driver is that you are making 75% of the effort to sustain the marriage, which has allowed your wife to make much less effort. That has enabled her to indulge her selfishness and take everything around her for granted.
You need to ratchet back, stop doing all the work, and make her step up to the plate and devote some of the energy she threw into feeling sorry for herself and pursuing the OM to pursuing you and convincing you why you should stick around. Instead, as hurt as you are, you are doing the rebuilding work after your wife spent two years building a missile that she then fired at the family. Had she been less confident that you would be around to fix everything, no matter what she did, she might have thought twice about her affair, and she might have focused some of the time she dedicated to flirting with the OM on flirting with you and keeping the spark in the marriage.
What I am saying is that you make it easy for her to make very little effort, and to virtually ignore your needs. She has taken you for granted, because you are such a stand-up, make-an-effort guy who is focused on what he can do for the people around him. It is because you don't focus on yourself, and are effectively a self-propelled, self-maintaining unit, that your wife has got used to not having to make any effort to support and maintain you emotionally. That has to change. If she can throw her energy into chasing some alcoholic ex-neighbor who does nothing for her beyond wanting to screw her, she ought to be building a statue of the man who busts his tail putting a roof over her head and food in the fridge. But she doesn't, because she takes it for granted that you will always be there, and that you require very little maintenance. And what has happened after she has indulged in two years of self-centered, don't-give-a-damn behaviour? You are still there, and you are making all the effort, including buying books about your emotional well-being that she ought to be buying.
You say that you want to give it six months, and I think that is a very good idea. Beyond any of the issues between you and your wife, there are three kids to consider, so any action that affects them has to be carefully considered. However, I believe that you will be wasting your time if you allow your wife to play the victim, and try to find deep, dark psychological motivations and justifications for what she did. Her motivations were obvious, basic, and entirely self-centered. It is as simple as that. I apologize for being crude, but she was a bored housewife who decided to bang the pool-boy while her husband as out working. In this case, she also spent two years obsessing on the pool-boy and ignoring her husband's discomfort and emotional needs. That is not abandonment, it is the height of self-centered entitlement. And as long as you make so much effort, she doesn't have to change.
So, to make something positive out of what has happened, the next six months should be focused on making your wife devote her energies to convincing you why you should stay. Do not indulge or accept her self-centered approach to the marriage. Make it clear to her that she is on six months' probation to prove to you that she can change and become a supportive and loving wife. Think about what you need for once, and make it clear that you are not content to go back to the way things were.
Now here's the thing. I get the impression that you are a square-dealer and a straight-talker. 'Acting' may not come easily to you. But what you need to do over the next six months is act your socks off. It doesn't matter if at heart you have decided that you are going to stay, no matter what. That will not give your wife any motivation to get off her behind and change. So what you need to do is throw a scare into her by acting like you will definitely be gone at the end of the six months if she does not change her ways, win you back, provide the emotional support that you need, and shoulder something closer to 50% of the work needed to sustain the marriage. Tell her, in no uncertain terms, that you are no longer prepared to be neglected and taken for granted, and that if she thinks continuing that is fine, you will be gone and she will be relying on alcoholic loverboy for support. She has grown used to being 'carried' by you in the marriage, and she has focused her energies elsewhere. It is time to take her off your back, and make her understand that if she is going to flirt with anyone, she should be flirting with you, or you will be heading elsewhere to find a woman who will show more appreciation for you. You mentioned your ex-girlfriends, and the potential for a 'revenge' affair with one of them. Instead, why not tell your wife that it is perfectly easy for you to start messaging them and doing exactly what she did. That it will be very easy for your work trips to be the perfect excuse for being out of the house, seeing someone else. In other words, threaten her with what she did to you. Motivate her to take you seriously as a man with needs - sexual, emotional, and security - that she has to start fulfilling. Not as punishment, not in any sadistic way, but to give her a shock to the system and motivate her into being a better and more supportive wife.
You are so used to focusing on other people and ignoring your own needs that your wife has got used to doing that too. That must change. Your wife fired a missile at the marriage, so you need to fire one back at her: you have six months to change, get your head out of your behind, prove you can support and love me, or I will be gone. Make her believe that, regardless if you are going to stay whatever happens, and see what changes she makes.
Her biggest driver has been taking you for granted and ignoring you; you need to shake her out of that complacency with some shock and awe, for the good of the marriage, and the future security of your kids. Time for some tough love, Gator.
[This message edited by M1965 at 4:56 AM, May 18th (Thursday)]