Mistress Katy wondered why her slave kept forgetting things and she did not like it. She wanted him to put some effort towards remembering things so she crushed and trampled him using her sneakers. The mistress crushed his head because it was the one which needed to do the heavy lifting. Mistress Katy also made him lick her soles before she felt it was enough punishment. She wanted to see whether he would change.
Whenever mistress Serena wants something done her way, she politely asks. When it is not done for whatever reason, she gets it done by force. This loser ignored what she said because she had asked nicely and he had assumed that she was an easy person to manipulate. So she stomped on his chest and she crushed him to send a message. He had no choice but to endure the pain and still do what she wanted.