Looking for the Villainess's Contract Husband

One day, while suffering from a severe fever, I realized that I had been reincarnated as the daughter of the villainess in a novel.

Thanks to remembering the original story, I knew what the future held, but it wasn't very hopeful...

My mother, the villainess, is destined to be used until the bitter end before she dies, and I am also doomed to die without ever finding a cure for my terminal illness.

Still, there was exactly one silver lining. While there is no way for me to survive, I can at least save my poor mother.

'Mom, you have to live. Live happily, in my stead.'

To save my mother, I sought out the Duke, who was a supporting character in the original story.

"Therefore, please propose to my mother, Your Grace."

Using my knowledge of the original work, I struck a deal with him. In return, the Duke rescued my mother and me from the clutches of my cruel maternal grandfather.

After safely concluding the contract, I intended to go somewhere no one knew and quietly meet my death, but...

"Livy, I think I'm feeling a bit sick. Could you hold my hand?"

Why is some sickly, pretty boy clinging to me? And by the way, is he really sick? He seems a bit suspicious