Princess Nikki has a shit fetish. And whenever she can, she always makes her slave do what she wants which is usually to eat her shit. She does not do anything else to him like punish him using high heels or ballbust him. She only makes him eat her shit like she did today. He has eaten her shit so much that he has probably gotten used to it by now.
Mistress Emily was in no mood to joke around. Her slave thought what she wanted him to do was a joke so he did not do it. She was pissed that he had ignored a direct order so she punished him for it. She undressed and forced him to undress as well. Then she made him eat her shit. And she made him eat it straight from her asshole into his mouth.