Severus' boggart was not Lily's body- it was Harry's. He resigned himself to Lily's death, but he could not have handled Harry's death, because he was his last connection to her. Now thanks to Lupin the third years know.

Nadine's world is quickly changing as she learns nothing she knew is true. She has magic. Her father is not her father. She is wanted by a Dark Lord. But still she can't know the truth about anything, because they're telling her it will put her in danger.