This slave talked too much and mistress Zephy did not like it. She had to shut the loser up and to make sure that he learned to only talk when spoken to or when it was indeed necessary. Not the way he was used to talking unnecessarily. That is why she used her femdom fetish to deal with him and to humiliate as well as to degrade him the way she did.
This guy was a bully but mistresses Svea, Catdeluxe, Gabriela and Reell had asked him to stop but he ignored them and even felt that he could bully them too. They waited to see if he would change but he did not. And out of anger, the mistresses gave him a beating when he did not. He was kicked, punched and trampled by the angry mistresses and that is when he took them seriously and stopped bullying.