Lady Kara went and looked for coal. She dipped her feet in it and she made sure that her socks and her feet were covered in coal. She then made her slave lick her socks and her feet clean. The cruel mistress also forced the slave to chew the dirty as well as sweaty and smelly socks and like everything else, he had no choice but to do as told.
This mistress likes slaves who are hardcore. She hates slaves who cannot withstand any pain. As she was recruiting her newest slave, she tested for pain threshold. To do that, she forced the slave to kneel down and she slapped him as hard as she could manage. She was however impressed as her slave braved the pain and did not cry like many others do when slapped even a little.