Possible Clues:

• Vestal virgin in Roman legend who betrayed Rome to the Sabines
• In Roman legend, a vestal virgin who betrayed Rome to the Sabines
• A pirate on the rampage? One who was expecting to get jewellery treacherously
• What's not odd for Sabine spy, traitor backing Rome's betrayer?
• Virgin traitor in scene of fatal rockfalls
• Pie cooked in seat of kings for fallen Roman traitor
• In Roman mythology, a vestal virgin who betrayed Rome to the Sabines
• Virgin daughter of rumoured spurious father, in tragic rockfall
• She betrayed Rome with a pirate at sea