Mistress Valeria is an expert in foot fetish and this girl wanted to also learn how to be as good as she was at it. She had to start her off with the basics so she asked her to lick her feet as per her instructions. She would also crush food and other things then have the girl lick them still according to her instructions. It was demeaning but she learned a lot.
When this mistress had a new slave, she chose to test him so that she found out the kind of person he was. The mistress went ahead to dominate the slave using her socks and her bare feet. The slave was not sure how to react but he did what she seemed to want as he was afraid that if he did not, she would get pissed and harm him.