Basically, share two lines that are actually in your story and one that could be. Let people guess which line is the fake, but under no circumstances tell them the answer. if they are curious they can check your story out
"I can’t imagine there being a lot of good kinds of attention I’d get walking around looking like human graffiti, and I’m better safe than taxidermied."
"When your parents told you they'd be fostering a girl from over East-ish, you didn't expect her to be venomous, did you?"
"Ohhh, well, they’re just a lot of fairy tales, I guess. The Sanctuary has been collecting lots of accounts from all around the world about your kind…I mean…about people like you. They're all a bunch of nonsense stories of course. ‘Cinderella,’ ‘Snow White and Rose Red,’ ‘The Odyssey.’ You can read some of them if you like."