This guy had refused to be corrected. He was wrong but he did not want anyone to say anything to him. These mistresses were not going to let him think that it was ok to do that and so mistress Lilli, mistress Scarlet and mistress Gloria punished him cruelly and did so with their hard and brutal slaps. He was tied up and they made sure that he could not resist.
Mistress Lilli did not like the fact that this guy had tried to sabotage her. She did not want him to think that he could do it and get away with it. That is why she had to tie him up and then do whatever she wanted to him. He begged her to stop when she slapped him repeatedly but she did not as she wanted him to never forget it.