 What is Miss Casey's motivation to feed the narrator?
The golden Moon and the silver ship, symbols of greed. All my great-grandfathers have it. The tubercular clerk looked up from the gaudy comics sections of one of those little tabloids that have the funnies a week in advance. I found I couldn't focus both my mind and my eyes through the electric flashes of agony, so I concentrated on Doc's voice and trusted my hands would follow their habit pattern and construct the symbols for his words. They told everything I needed to know to become the most powerful man in the Solar Federation. Caffeine affected my metabolism like a pure alkaloid. I surrounded it like an ameba, almost in a single movement of my jaws. No other girl would introduce herself as Miss Last Name.
 She is after Kevin's secret.
 She is a good school teacher trying to help the needy.  She is police officer investigating stock market fraud.  She wants to give him a secret note.  She is after Kevin's secret.