Pffff, just because it's been a while since she's terrorized him doesn't mean he's forgotten. Every moment spent with Dee is an ADVENTURE waiting to happen! But hey, it beats standing around staring at walls, right? When he's not saving her and/or himself from Certain Doom. Which he doesn't mind, really -- the saving part, not the Certain Doom part.
And hey, that doesn't mean she can't try, right? She just has to give him a whooole lot of books, get his approval up to 100, max out her Coersion, and slip a whooole lot of lyrium into his tea.