“As it turned out, Granger’s moment of pure self-indulgence? Her terrible indiscretion? Her vice? Visiting a library.
“A library?” repeated Draco.
“Yes. At Tynstesfield.”
Draco wanted to scream with laughter, but felt that would be unprofessional. He settled for gasping out, “The decadence.”
“I wish you’d go away,” said Granger with cutting sincerity.
“The absolute sin of it all,” said Draco.
“Please Apparate home to your mother–”
“A library. I shall have to report it.”
“–As you can see, I’m quite safe here; the only remotely bad things are your attempts at humour.”
“What other naughty habits have you got? Churchgoing? Baking?”