This guy was new and mistress Iside wanted to test him and find out whether he had what it took to work for her and be with her. That is why she chose to test whether he could follow instructions as well as lick her feet and her boots. He seemed smart and he understood that what he was being asked to do was a test so he did not ask questions. He just did it.
This loser pissed off mistress Iside so badly that she had no choice but to dominate him. And she did it with her boots, which is something he did not expect. He had to lick them clean and that was while he knelt down. She also threatened him with high heel trampling but she did not do it as he had cooperated on the boot licking and she did not want to punish him any further.
Mistress Iside was disappointed in the way this guy behaved. And she had to degrade him to teach him never to do it again. In effect, she knew that she had to control him and she did so using her boots femdom. The guy was shocked at the turn of events but he did not have a choice other than to do what he had been ordered to do. He learned to fear her.
This guy tried to charm his way into the panties of mistress Iside and her friend but the plan backfired as he did not endear himself to them and he had to learn his lesson the hard way. That is why the mistresses had to find a way to deal with him for their own fun and enjoyment. The mistresses had him lick their muddy boots and that did the trick.
This guy tried to con mistress Iside and her friend and he learned his lesson the hard way as the mistresses played along despite knowing his intentions. It was to lay a trap for him and when they had finished doing so, he was forced to own up to what he had done and he was gagged with their boots. He was humiliated and had to lick them until they were clean.