"She did everything Scorpius told her to do because she was crazy about him! When she realized she had a better chance with Barnabas the Fool's tapestry than with her beloved, she decided to get revenge and kill him. At that point, she settled for you, the calmest and most agreeable Ravenclaw! Who knows, maybe she still likes him. Tell me, Sparrowhawk, do half-dead, half-reptile boys turn you on?"