Translation issue maybe.
From what I remembered, she is saying something like she never heard that before.
And technically, no one ever told her that.
She got spoiler from Emi memory.
Well it's Cuvie.
For me, one of the strong point from Cuvie hentai is the story. Even if I don't like the fetish or genre, usually it still worth it to read/check Cuvie hentai. Not to mention, Cuive girl design usually pleasant to look at.