I've read some spoilers from nvlupdates n tried to read the novel (using mtl) . All I can say is "wow". Fawk everyone in this manhwa. And the Duchess? I don't hate her. But fawk off girl
You can read the spoiler here:
https://www.novelupdatesforum.com/threads/solo-for-two-%EC%86%94%EB%A1%9C-%ED%8F%AC-%ED%88%AC.168431/
And the novel here:
https://booktoki325.com/novel/2346099?stx=%EC%86%94%EB%A1%9C+%ED%8F%AC+%ED%88%AC
Hot spicy toxic you name it.