BH and I are certainly far from "several years out from DDay," but one of the pretty horrible rationalizations that I made during my A was that even IF he found out, he would probably stay with me for our daughter's sake, as he had for so long in his previous marriage. I thought maybe eventually he'd come around to forgiving me and we would have love between us again someday (I had also convinced myself he didn't love me during the affair, so this kind of seemed like I wouldn't be losing much. Again-- horrible rationalizations for consequences I had no idea about at the time. Totally wayward thinking.) We put a pretty "strict" (that's probably not the right word but I'm having trouble coming up with another one) pre-nup in place when we got married because I earn about 10k a year to his 350k+, and it limits alimony to like a lump sum of 10k or something. (It's been a long time since I read it. But I always thought the idea of paying someone to not be your spouse anymore was bizarre, and I know I have the ability to make money and support myself if I need to. And he'd never let any child of his struggle financially.)
I was really confused on DDay when he confronted me, and after I admitted to the A, he asked me "What do you want to do?" Because at that point I fully expected him to be making a decision about whether he still wanted to be with me, rather than the other way around. So I started with, "Well, I think it would be best for [insert child's name] if we stayed together..." and he was like, "No. What do you want?" And I was like, "Well I want to be with you, of course," as if there wasn't any reason for him to be asking. I never once thought about ending the marriage, but obviously in hindsight that's not how someone who wants to be married behaves... The massive amount of pain in his eyes and the fact that he was still afraid of the relationship ending combined to make that moment 1000x more awful, as I knew that he still did love me, and I loved him, and yet somehow I still went and did that to him... I won't ever forget it.
So yeah, I was all pragmatism by that point. I think a lot of WS just want to be loved and/or made to feel good/valued/esteemed/etc., whether that's by their BS or their AP. So maybe your W rationalized at that point in time that if you were both choosing to stay, you had to be doing it because you loved each other; otherwise her decision to stay-- to exit a "relationship" with an AP who made her feel loved/good/valued/whatever for a relationship where she isn't loved at that point in time and in which she would be in the doghouse for several years, to understate it-- would have been much harder to make. I'm sure looking back and seeing the reality isn't easy for her to do, but it is the reality, and she'll need to come to terms with it.
[This message edited by GotTheMorbs at 3:04 AM, Saturday, May 30th]