Unable to endure the greedy and unscrupulous people from his wife's family, Duke Arthur Kaplan ...
ML hated FL's family, that hate is also projected towards FL. ML forced FL to divorce, when FL finally agreed, he went all his way to disguise himself as a gigolo and eventually, asked for forgiveness.
It's alright ig, ML was forgiven too easily. He begs for FL then the next chapter everyone is happy already.