Madame Svea accidentally found out about foot fetish when she came home with smelly socks. She found her slave had messed up and she made him lick her sweaty and smelly socks as punishment. That is how she came to find out that she could actually use stinky socks as punishment. And she has never looked back since then. So she made have smelly socks a regular thing for her.
Mistress Vanny wanted to humiliate her slave and she managed to do that using her foot fetish. She sat on the couch and she had her slave smell her feet and do what she wanted. She made sure that her bare feet were smelly before she had her lick and smell them. He kept apologizing and saying he will never piss her off and she knew he was telling the truth.
Princess Serena wanted to show this loser that she knew what she was doing and he had to trust her. He was a pain in the ass and he kept asking a lot of questions which she did not want to answer. She humiliated him using her stinky socks and her smelly shoes. When she was done humiliating him, he did not have a choice but to go with what she wanted.
Mistress Serena was angry at her slave. She had caught her slave doing things she did not approve of and she had to punish him. She did this by trampling him with her bare feet. She crushed his face and she tortured him badly. She had fun as she humiliated him and she knew that her slave had learned his lesson and he would not piss her off at any time again.
Lady Kara was pissed at her boyfriend and she did not want to talk to him. She wanted him to keep quiet and she made sure he did by trampling his mouth using her sneakers, her socks as well as her bare feet. She humiliated him and got him to keep quiet at the same time. She loved the quietness she had and spent the time chatting on her phone.