Emma's Secret Domination

In this, the sixth volume of Emma's story, Emma returns to London only to fall back into the clutches of her cruel former mistress, Ursula. Realising she has missed the bitter sweet delights of lesbian domination, she finally begins to enjoy Ursula's attentions - but this only serves to anger and humiliate the prince, who is still her master. He has plans for making her see the error of her ways - plans involving training her to be his personal pony girl, to race against the pony girls of the sadistic Sheik Farouk. But how can Emma hope to please both the Prince and Ursula?