Husband had a bad time with his job and lashes out on his wife, their relationship goes awry and she gets a job but eventually cheats on him with her boss, he finds out but lets it continue because he feels it's his fault this happened (The tittle refers to it being BOTH the ones at fault, not just the husband or the wife here, BOTH are guilty though I say she went overboard here) and leaves home early to his new job he got through his wife's connections pretending it didn't happen as his wife keeps having an affair with the other guy we see a glance to some papers that looks like a divorce sheet with her name on it with her name but no signature or anything else I know of.
Author's after words says it's going to have more sequels to make a trilogy and that next chapter will be from Wife's pov, I guess it will show how she became a slut for money and then for pleasure.
Also, vote down very long hair tag, the wife's hair is just normal long.