Evil Child Black-Bellied Mother

Novel Summary
On the surface, she was the widely despised man-chasing idiot, but was actually the owner of the world-famous and widely acclaimed chain store “Singing Lady.”
On the surface, he was the bloodthirsty Ghost King that cursed all his wives to death.
However, he was actually the head of an infamous assassins clan, and his power was heaven-defying; creating terror in the hearts of all who heard his name. With an imperial edict, she was bestowed to him in marriage.
However, he kept on refusing to obey the edict and sent people to kill her.
The day of the wedding, she packed up her things and ran away, and finally did he realize that his heart no longer belonged to him but to her…
– Description from Novelupdates