A Family of Regression, Possession, and Reincarnation

Summary:
“Please propose to me.”

I was reborn into a book and made a contract marriage with the villainous side male character.
My role is someone who is sick and dies before the original story begins.

During the contract marriage,
I plan to cut ties with my terrible original family and find a cure for my illness!

But…
It turns out that my husband, who is called a “devil” in the empire, has returned from the past.

“Be my wife and live quietly for one year.”

He remembers his past life and hates me because my family is his enemy.

He also adopted a son who says he is reincarnated.

“What was your real name?”
“My baby. So cute. Pretty. My puppy. My child.”
“…”
“I have a lot of names!”

But in his past life, he wasn’t even human.

So now, there’s me who was reborn,
a husband who came back from the past,
and a son who was reincarnated.
We were only supposed to be a fake family for one year…

But then—

“Wait. I’ll go deal with that guy again.”

My husband, Lennox, wants to torture a man who insulted me.

“Now? I have to eat breakfast with Duren.”
“…”
“Then after breakfast.”
“You need to go on a walk with Duren.”
“…After that, then.”

My contract husband started acting like he could do anything for me.
…Wait, didn’t you say you hated me?