At long last I have found myself a sex-slave. I've been having her masturbate 3x a day stopping just before she cums for over a week. Tomorrow she is to ask me to fuck her ass (she still has her anal cherry), and as I do so she will be given permission to finally cum if she can. We have a contract, which she signed, that gives me virtually unrestricted control over her (except things like finical ruin, disfigurement, death).
As I continue her training I am open to suggestions on how it should progress and what should be done.