The adopted daughter-in-law wants to leave

I possessed the body of the no. 1 villainess, Ellie, who was a terrible person who tormented the male lead in the orphanage. I quietly waited until the day that the duke would pick him up vowed to never get caught up in the novel, so she would not see the ugly ending that the villainess did, until... "I will also adopt the child next to him too... She will become my daughter-in-law" I was adopted along with the male lead! I can't just do this? There's a separate heroine!

Read manhwa online I Don’t Want To Be Duke’s Adopted Daughter-in-law , The Duke’s Darling Daughter-in-Law, 입양된 며느리는 파양을 준비합니다

I have possessed the body of the extremely cruel villain who tormented the male lead while in the orphanage.
“Just don’t do that”
I thought so. But it looks pitiful that he keeps getting beaten up by the other kids, so I’ll keep an eye on him for a bit.
“The child next door. I will also adopt that child”
“Am I adopted?”
“No, I will take the position of daughter-in-law”
…Like that, the male lead and I were adopted together. But how can that be? And the female lead!
***
As expected, the male lead joined his adoptive father to join the war. And when he returns, he’ll be with the original heroine.
I prepared very carefully for divorce and deportation from my family. With both in the past time, I have made a lot of money! But…
“Damian, did you go home alone? Did anyone else come with you?”
“Others?”
Damian’s gaze suddenly sharpened at my question.
“This is so awkward, Ellie. Are you looking for a man other than your husband?”
“Huh?”
“No way. I would probably kill that man out of jealousy.”
I looked over to my father-in-law for help.
“I also agree. Ellie shouldn’t betray her husband somewhere.”