" The hell with your secrets,” shouted Bonnie.

“Language, language! How about this: One of you has kept a secret all
their life, and is doing so even now. One of you is a murderer—and I am
not speaking of a vampire, or a mercy killing, or anything like that. And
then there is the question of the true identity of Sage—good luck on your
research there!One of you has already had their memory erased—and I don’t mean
Damon or Stefan. And what about the secret, stolen kiss? And then there is
the question of what happened the night of the motel, that it seems that nobody
but Elena can recall. You might ask her sometime about her theories about
Camelot. "

― L.J. Smith , Shadow Souls (The Vampire Diaries: The Return, #2)