From SuspireWiki

(n., archaic) A Kindred or ghoul who uses the power of Ventrue blood to force or coerce a subject into behavior fulfilling a prophecy, especially if the Kindred or ghoul is also the source of the prophecy. Truly prophetic beings are not regarded as sibyls by the Ventrue; among them this term quietly but surely indicates a scam, exploiting the appearance of prophecy to cover up the use of the Dominate Discipline. (There is no masculine equivalent for this usage – the distrust inherent in this definition has never escaped its ancient sexism – but the term is applied to men as well as women.) (v., modern) To act as a sibyl against someone.

She’s been sibyling the neonates on the West Side for probably ten years.