Falling In Love In Tough Marriage

She, the Yan family's noblest adopted daughter, was married to the city's most privileged Mu family's youngest son and sits in a position that everyone envies. 
In front of people, she was in love, but behind people, she was in sorrow. She married him only to pay a debt of gratitude and keep the Yan family safe. He marries her only to take revenge and settle his heart's grudge.
"What will it take for you to let me go?" She asked. 
"Never! Unless you die!" He replied. 
The beginning of hate can only end with death. 
When the woman he loved so much returned with their daughter. She, on the other hand, is six weeks pregnant, and he chooses to abandon her when she wants to hold on to the marriage. A divorce paper put an end to their relationship for good. Y
ears later, she returns as a top designer and he blocks her in a corner, "Who allowed you to leave with my child?"  
"Who said the child is yours?" She, bluntly, denied it.