Madame Marissa wanted her hiking boots licked before she used them to trample the shit out of this slave. She had had enough of him and his behaviors. She had asked him to change many times before but he did not and she had no option but to punish him and so the mistress cruelly ensured that he felt the pain and that he cried and begged her for mercy.
Madame Marissa felt that she had to test the slave's pain threshold because she wanted to teach him a lesson and do it in a way that he would never forget. The mistress knew how to go about it and that is why she used her hiking boots femdom to get what she wanted. And she loved the fact that she got what she wanted at the end of it all.
Madame Marissa did not like how her hiking partner was behaving. He was slowing her down and making it harder for them to continue hiking. She had to complete the hike and she did not like what he did. That is why she chose torture as well as degrade the guy with her hiking boots. He was crushed and trampled until he agreed to stop wasting her time and slowing her down.
Madame Marissa needed to use her hiking boots to hand trample this loser. He had shown disdain to her and she did not like that. She had to punish him and she had to torture him so that he learned to stop doing those things. It was more painful than the guy thought it would be and he cried at what she did. And that is how he learned his lesson.