Mistress Roxanne wanted her boyfriend to be tougher than he was. She did not like weak men but she did not want to break up with him so the only other option she had was to use him as her trampoline so that he felt pain and he got used to it and it propelled him to be a tougher person that he was. And it worked as the guy got tougher.
Mistress Roxanne hates lazy people and she was shocked to learn that the new assistant was lazy. She had to nip that in the bud seeing as he was new. And so she trampled him as cruelly as she could and also facesat him so that he would not do any such thing again. The mistress choked him in the process and he learned his lesson and stopped his lazy habits.