
Sorry to barge into your conversation but I was thinking that maybe she read stories in the past where you wake up in someone else's body? She might have also gotten the idea when Sasha asked her is she knew the novel, which is how she got the idea of there actually being an origin story. Sorry it's so long and again, sorry for barging in...

But even if Lilith became a different person due to having a more difficult life it still doesn't explain why she would know about the original story.
It would be pretty cool if you were right. It would different from all the other isekais where the original main character turns out to be a crazy evil person.

True, there are some things already very different from the original story. I haven't seen the raws, so I'm probably wrong. But I was thinking that maybe whoever is the reincarnator close to Lilith might have poisoned her mother to move things along and get the ending they want. Though that doesn't explain why Lilith was acting so seductive at the party ╮( ̄▽ ̄)╭
I don't think Lilith is a reincarnatior. I think maybe someone around her is, since she didn't react to the name of the novel but seemed triggered by the phrase "original story". Though that doesn't explain her weird behavior at the ball. I guess we'll see ╮( ̄▽ ̄)╭