Lady Victoria wanted to trample this slave and she did this while he was naked. She even laughed at him as he tried to beg her for mercy. She felt that he was being too dramatic and she continued laughing at him as she trampled and stomped on his naked body. The pain was intense but he had no choice other than to do what she wanted him to do.
This loser needed to be punished and that is what these mistresses did to him. He had to be taught a lesson and that was done as the mistresses chose to trample the shit out of him. The mistresses did it slowly and took their time doing it so that he learned his lesson the hard way and that it was more painful for him at the end of it all.