Oh, I think he'll find out in BG, but he won't have a way that he can let Thomas out without his hunger killing him still..
The only answer I can see to that is the "Bigfoot on Campus" one... Thomas getting energy from someone with much more life-force available than the average human.
Sinister twist. Justine is a spy. Has baby. Thomas finds out she is a spy. Even though it might not be Justines choice (Nemesis) And fatally feeds on her. Thomas and Harry share the pain of killing the one they love. Justine/Susan
FEELS GOOD BEING RIGHT. ALMOST WORD FOR WORD. LIKE I'M PSYCHIC. (GLOATING)