As Derick's words fell, not far away, the maids nearby led out several mares from the stables.
However, don't misunderstand, these mares are not real horses; they are transformed from some beautiful women.
First, the team responsible for managing Derick's harem would select some young and beautiful girls with voluptuous figures, especially suitable for riding.
Then, after a long period of training, they would gradually learn the behavior of mares. Subsequently, they would undergo thorough body modifications, equipped with special horseshoes, reins, saddles, and so on...
Even their large breasts used as armrests for the master, and their tender orifices used to secure the penis, would receive special training to provide the most comfortable riding experience for the master.