I'm with Cinisajoy on this, not liking it much at all.
The sentence fragments ("In her mind at least.", "Who is no fantasy.") feel overdone and/or out of place. The whole thing feels jerky (not as in beef, but as in spasmodic
), "Compulsively readable" sounds like being damned by faint praise. I still can't work out whether Lily is actually a ballerina or whether she's dreaming - not sure if that is intentional. I can't work out why Lily's life may be in danger.