Mistress Jolie needed to find a way to dominate and humiliate this guy and she did so in a way that the guy would not forget. She had to make sure that things worked out the way she wanted. That is why she chose to use her chastity key fetish to do it. She had him lick her feet and also made him cry as she made him feel pain from the dick lock.
Mistress Jolie was of the opinion that things had to work out the way she wanted them to. The mistress did not want to deal with someone who did not know what to do and how to do it. That is why she went out of her way to teach him the kind of things that he had never experienced before. The mistress used heels to make sure that he got his lesson.
Mistress Jolie had a new slave and she felt that the best thing to do to him was to scare him shitless and that is exactly what she did to him. She did not want him to think that she could let him do whatever he wanted. He had to learn what she liked and what she did not like and above all, he had to be scared of him. She kicked some balloons which were on his balls to scare him and it did the trick.