The Villanins Favorite Is Me

Description of the manga The Villanins Favorite Is Me:

Briefly about manhwa The Villanins Favorite Is Me:
After Lumina’s parents passed away, she was left to live alone with her younger stepsibling.
She died a horrifying end, but only after being used by her family members who were after her family’s wealth.
She was 12 years old when her parents passed away when she opened her eyes!
 
“How are my relatives doing?” I refuse to look at it.
 
With a vow of vengeance for her family, she went to see the villainous Hart family, the most powerful family in the Empire, and boldly requested assistance.
 
“You claimed you could cure my son?”
I will indeed heal the Young Lord!
 
You may question, how is it possible?
The reason for this is that I am a healer and the one and only transcendental medicine!
 
But isn’t the regressing circumstance a little odd?
 
“What makes you treat Older Sister so kindly?”
My younger brother experienced a great deal of awkwardness and miscommunication without realizing that I was scheming behind his back.
 
“It will be nice for you to celebrate my son’s wedding, as expected.”
The villain’s heart has been won over more than is necessary.
 
Even to the point where I marry into the villain family as their daughter-in-law!
 
***
 
“Now that the agreed-upon period has passed and the marriage was forced, it’s time for the divorce.”
You are aware that I cannot survive without you, are you not? However, a divorce?
“..”
“Want to watch me lose my mind?”
 
Even worse, he is smitten with me after saving my spouse, who was supposed to die.
 
I declared that I wanted to lead a simple life after getting my retribution!