Sirensong (2011)

When Dana is invited to Faerie to be officially presented at the Seelie Court, it's no easy decision. After all, everyone knows Titania, the Seelie Queen, wants her dead. But Titania claims not to be the one behind the death threats; and her son, Prince Henry, makes the decision a whole lot easier when he suggests Dana might be arrested for (supposedly) conspiring with her aunt Grace to usurp the Seelie throne. So she and her father better do as they're told.