Mistress Zora is hot and she knows it. Her husband is in the military and he is usually gone for long periods of time. And that is when her brother in law saw an opportunity to seduce her and it pissed her off that he did not respect her, did not respect his own brother and did not respect their marriage. She had to teach him a lesson and she did this by wrestling him and beating the shit out of him. She also landed kicks and blows on him. He never did it again.
Mistress Zora is a pro when it comes to wrestling but she does not like to showcase her skills or even broadcast them. And that is why this guy laughed and thought she was joking when she asked him for a wrestling match. They bet some good money that whoever wins takes it all. From the word go, she humiliated him as she pinned him down and she crushed and humiliated him.
Mistress Zora wanted her slave to learn about self defense so that in the event of anything happening, she can have someone else to help her fight. He would also be able to defend himself in different situations. The mistress felt that the best thing to do was to trample the guy and choke him so that he would get used to the pain before she taught him about fighting and wrestling techniques.