Degrading this guy was one of the top priorities of goddess Gabriella. She felt that she had to dominate the guy and do it with her feet so that it would be as painful as she wanted it to be. By the time she was done with him, she knew he was in pain and he had pledged to never do what he had done. She believed him and let him go.
Mistress Ariel does not like to be rushed and that is what her boyfriend did to her. She was so pissed that she had to do something to ensure that it never happened again. That is why she used her bare feet to punish him. He had to endure her trampling before she was done with him. The mistress also had her man lick her feet and gag on them too.