Touché
I myself have never been in a relationship ... ever. (well one that wasn't a prank) And I know people have their reasons but it doesn't mean a thing to me really. You gave your word to that person and you broke it.
and you can absolutely write the other person's interpretation that simplistically. Some folks insist on seeing things that clear-cut, mostly through generous helpings of denial and hypocrisy.
My point is you can't only see the "cheater" that simplistically as a writer, if they are ever going to be more than moustache-twirling caricatures of evil cock-gobbling slut-women. Which is NOT going to market well.
I came across something called the Dark Triad theory and have plans to check it out later on. I don't know too much about it personally to make a statement on it however I did see it pop up in conversation on various sites and blogs.
So the reasons why are as you've all said very abundant and I will have to find some appropriate reasons for my characters when I get to that part. What situation they'll be in, the circumstances, etc.
However I do see a standard format with most stories I've read that I'm already going to avoid. Things such as the initial discovery, handling the aftermath, and moving forward. I'm not sure I follow....you're not going to have your characters....move forward?
With my limited knowledge and from what I read its clear cut. The husband failed to satisfy some need his wife had. Whatever that need was someone else took care of it. She no longer loves and respects him because of his failure to fulfill that need and the relationship is pretty much over. ...and you're already off the rails again. In many cases the husband fails the wife, or perhaps she only sees it that way, but in many of those cases she also still loves him. Love, fucking, and everything in between is complicated. Again, you can't boil it down to a black-white, good-bad, in love-out of love sort of binary. Life isn't like that, and your book will feel incredibly stilted and manifesto-ish
I like what Bright said earlier. Maybe the husband thought he was doing everything right just to find out that he was doing everything wrong. truth be told, this probably happens at least as often as intentional slights....in some of the cases I am thinking of it certainly did, the guy was a good guy, but clueless in some area of their relationship and unable to see how alone he was leaving his wife. So maybe its the husbands fault. this isn't an endorsement of cheating, but maybe....it is nobody's fault, or both of their faults.
I did some daydreaming how would I feel if I came home after day of work and see my wife getting plowed by some dude I don't know and see her enjoying every second of it. Answer Devastated. What would I do? Let her be with the one she loves. good answer, let her be with the one she loves. And as someone who's had to let go of someone he loves, because she chose someone else, it is gut-wrenching. We weren't even married. But here's the next question: As i said above, that may not be the one she loves. And you, or your MC, leave or stay, may want some closure. Just food for thought.
Clearly its not me. I'll Ghost and send the divorce papers. Me personally I try to avoid situations that would require physical violence (for personal reasons call me a coward if you wish but if possible I try my best to remove myself and friends from those situations. If I have to use force I will.) but there is no requirement for violence here...Had I came home and saw things knocked over and broken and my wife screaming for help or at least trying to fight the guy off then it would've been go time. Otherwise it was it is. If she prefers to be with someone else I'll just leave. If the other guy gives her the happiness she wants who am I to take it away? Would I forgive her? Sure. Would I be married to her? Nope.
But even then I wouldn't know because it hasn't happened yet. May never will either according to a few things I came across.
So the reasons why can go from the ground to the sky.
I'm just looking for additional things to avoid. Like the amount the Drama that would go into the aftermath. That "baby I can explain!" my other annoying is one is "honey its not what it looks like." (really let's see two naked people covered in sweat on top of a bed is just a game of twister gone wrong?) Please.