From what I have understand in the story, the prince will be able to read your mind if you directly look into his eyes. And the FL doesn't always look into the prince's eyes while having thoughts about the novel so the prince won't know it. (Sorry for my grammar )
Ahh that makes sense thank you I was a bit lost I didn’t understand why she was thinking about what to do while he could read her mind but now I understood ty(⌒▽⌒)
From what I have understand in the story, the prince will be able to read your mind if you directly look into his eyes. And the FL doesn't always look into the prince's eyes while having thoughts about the novel so the prince won't know it. (Sorry for my grammar )