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.
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.