This loser did not want to play ball and this mistress was pissed off at the guy. She did not want the guy to think that it was all ok and so she used her hard femdom fetish to punish him. She did so in a way that he would never forget because it was painful. She slapped the shit out of him after she had tied him up and she got what she wanted.
This mistress knew that it was time to dominate this guy and she did it as painfully as she could for it to have an impact and help her to tame him. So she stripped the guy naked before she not only hard trampled him, but she also jumped on his stomach and other parts of his body to make it even more painful. The punishment worked as it was intended to.
This girl needed to toughen up and that is why this mistress went out of her way to make it happen. The mistress had the girl lick her bare feet and when she was done, she had to be choked with the mistress' smelly socks. The girl did not have any choice other than to endure all that was thrown at her so that she could finally be a stronger person.