Help find

Guys please help me find the manhwa. Here the fl is transmigrated and ml is the original male lead or something.
Anyway in the og story, the character she inhibits gets killed as a collateral of the ml's revenge against the villain so the fl thinks of staying away. But the ml chases her and they get married. Eventually the fl also falls for him. The emperor is the main villain and he had an obsession for ml's mother. He sent ml's dad to war and forcibly takes the mom and gets her pregnant and ml is born. The mon kills herself and the duke who was sent to war accepts ml as his own son. So ml wants to take revenge against thr emperor.
Anyway once fl meets emperor, she gets disgusted by how sadistic and perverted he is and wants ml to take revenge but ml rejects saying if his revenge would put fl at risk then he doesn't want it anymore.
Pls help me find