"Most of those Disney films have at least one sad moment."
Also, all sex is Ff, so if you want MF or Mf, this isn't your story. In this second part, Mistress Darla has a hard time finding a punishment to balance out the reward in lily's slave training.
Then Mistress Darla conducts a rather special kind of employee evaluation. The story is in three parts. Each part stands more or less on its own, but makes more sense if you have read the previous parts.
WARNING...the end of the story look at the video above ↑ ↑ ↑