Lady Soles needed to have fun at the expense of her husband and she also needed to scare the shit out of him so that he learned to do things her way. That is why she had to make sure he licked her feet as she trampled him and turned him into a foot slave. He was taken aback by what she did but she did not care what he felt.
This guy was not as well behaved as mistress Dula wanted him to be. She had to ensure that the guy learned his lesson and for that to happen, she had to be a little cruel to him. The mistress used her high heels to trample him and make sure he was in pain and that he begged her for mercy. She sat back and knew that the point was home.
Barbie made her slave lick her sneakers, which were dirty. But her humiliation and domination did not end there. She kicked the poor slave into a pool of dirty water as he got up from her trampling and humiliation