Princess Serena was pissed to learn that her slave was pretending. She hated pretenders and to make sure her slave did not do it again, she crushed him using her shoes. She made it so painful that whenever he wanted to be less than truthful, he would remember the pain and not do it. The punishment worked and she never had any issues with her slave about pretense after that.
Princess Serena was so mad at this guy that she chose to choke him. She used a plastic bag to choke him and she made him pee his pants because he was afraid of what she was doing to him. She let him go before air ran out but she had passed her message across. And he had learned his lesson and she did not expect to have any problems with him in future.