Lady Fenja did not want to dominate someone who did not deserve it. That is why she chose to pay this guy so that she made him do whatever she wanted. The guy was told to lick the soles of her sneakers and he did it since he had been paid for it. And when he did not do it the way she wanted, the mistress slapped him and made him do it again.
With her boots and her saliva, lady Fenja degraded this guy for catcalling and made sure he would never do it again. She did this by trampling him with her boots and forcing him to lick the dirty soles of her boots. In addition, the mistress spat onto his face and she had him lick the saliva. All this while, she was playing on her phone which made it more humiliating.