"Master, it's already midnight." one of the Witches reminded him. The group that had been torturing the Hero walked towards him, leaving her lying on the ground, barely conscious and covered with multitude of fluid.
As for the reason why they stopped, it because he promised to do them should do torment the Hero from after dinner to midnight.
"So it is." Frankly, the combination of the show Torturing Hero, and fucking Lisa made the time pass quickly. Which is a good thing as he get to enjoy the rest of the Witches who had waited for their turn.
"But first." a crucifixion board were carried into the cell, to which he tied the Hero to it. After using several strong vines, empowered by Demon Magic to tie her wrist and ankle to the board, he then set up something else.