Mistress Serena has a foot fetish. She likes to have her feet licked and smelled and she had to make sure her slave did it. She wore her sneakers without socks and she went for a run and when she came back, she had sweated and her feet were smelly, sweaty and stinky. She used them to trample her slave and make him lick her feet. She covered his nose and mouth with them and he nearly choked.