Mistresses Domi and Kimi wanted a slave and they had interviews. This guy impressed them during the oral stage but it was now the practical stage and they wanted to find out whether he would still wow them. So the mistresses chose to trample the shit out of him and also make him lick their soles. He understood the gravity of the situation and he behaved accordingly like they wanted.
Lady Anna Solis brought her friend Princess Rachel for a ride so she could show her how she makes her slave smell and lick her feet. She stops by the side of the road where she made her slave wait and she makes him lick the bottom of her shoes. Then she takes her shoes off and makes his smell and lick her stinky feet. Her and her friend laugh at the slave's humiliation.