coolcats
Am I interpreting this right ... that you stayed with her for 12 years after D-day?
Stayed with in the sense of living under the same roof with our kids - yes.
Stayed with in terms of being married (other than in law) - no.
When caught XW, a science-subject teacher, volunteered, no pressure applied and no emotion displayed, that she had exposed our kids to a real risk of abduction when they were 3 and 4 in order to spend ten minutes on her back with her best friend's husband, a relationship she initiated; a man who never kissed her, used her as an occasional c*md*mp (along with at least two other women), whom she claimed raped her when she tried to dump him, humiliated her in front of his friends, verbally and physically abused her when dumping her - yet I got the leverage to force a confession some months later - when they decided to recommence. She's a psychopath - in their mind you don't dump a psychopath - they dump you - even if it means submitting to repeated mistreatment. I imagine she presented my eventual kicking her out as me being manipulated into doing what she wanted - though in twenty+ years she never suggested divorce or even a temporary separation.
She admitted to a prior brief holiday affair - she was one of several in charge of school children and another married female colleague took up with a crew member so "she had to have one as well". That was it - no emotion, no attraction just competitive need - and no apology.
She told me, again unforced, out of the blue and without discernible emotion, that she was "almost glad" that I'd caught her because she felt she was getting to the stage where she would have had sex with any man.
Later she violently assaulted the (her) child she scapegoated, aged 8, because "HE SAID NO!" (I intervened robustly), ran up substantial debt and hid the evidence etc. etc..
She was desperate for me to be unfaithful - that "would even the score". She even put in writing that she "wouldn't make problems" if I had an affair - but that I should tell her once it was over or, if ongoing, after a year!
She was incapable of understanding that you can't break something that someone else has already destroyed. Psychopaths are unable to feel love, they know about it but they can't "do" it - love is having physical sex - that's all it ever is for them.
Twice during that dozen years XW's then best friends offered me sex - I've no doubt the second was at XW's behest! At XW's instigation we went to a dinner party with a married colleague and her husband - turned out it was four couples and swapping/group sex/whatever was planned for the after-dinner entertainment - as the saying goes I made my excuses and we left.
She is a pathological liar - even when telling the truth would be better for her. She'd lie and then expose the lie a little later because whatever she says NOW is true. She turns situations round so that she emerges with glory she doesn't deserve - even the one time she had to admit to me that she had lied she made out that it was a noble lie - a lie told to protect her best friend; one of those who had offered me sex and had, I knew, absolutely nothing to do with the situation she was lying about. I was told, I didn't ask, that once I'd dumped her "nothing in trousers was safe"
AIUI - When she retired she persuaded her dyslexic child to go with her to start new lives in a non-english speaking country (thus guaranteeing dependancy upon her) and then stole the money which was meant to provide them with their own property.
She knows that the things she does are considered evil by others - she doesn't(cannot) care - if she wants she must have it - often in order to gain what she perceives as revenge on someone. She's a classic psychopath - the part of her brain (the amygdala) which allows remorse, conscience, caring, impulse-restraint etc. doesn't work. Actually very predictable once you learn to think like them - just don't get stuck like it.
I was fortunate enough to have had a gorgeous friend (think [if you're too young - google] Angie Dickenson as Pepper Anderson) who had been through the equivalent - also had young children and good reasons for not immediately splitting up. I suppose these days it might be considered FWB - laughing/crying, cuddling etc. with her probably kept me sane throughout those dozen years.
Was I right to stay as long as I did? - I'll never know - both my kids are alive and reasonably OK - the elder told me they never suspected anything was wrong with the marriage until we split, I've never asked the younger. There's no way to go back and try an alternative.
I was raised religious (saw through it at 12) but I've got a clear conscience about the way I looked out for my kids - they didn't ask to be born and they were deliberately conceived though, in hindsight, my XW's motivation was probably not the same as mine. They had a safer life than had I walked, probably a financially better provided life-style and they were loved. There are very good reasons for believing that my X would have lurched from one desperate relationship to another were I not there, exposing my kids to all sorts of moral and physical dangers.
And it worked out pretty well for me. Successful in business, financially stable and enjoying a comfortable lifestyle with a very attractive partner of twenty years who appears to no more want to trade me in than I her.