That's what Mistress Melissa likes most! She loves having their young victims forced to do nasty and humiliating things like worshipping her feet and shoes or as seen in this case: Kissing and smelling her ass! She is a princess and her ass has to be treated like the ass of a princess. She also smothers her slave and to make sure he won't miss her smell.
Mistress Melissa has just tied up her slave. His hands are bound together on his back and his legs are crossed behind him also tied up. Now she goes on to play her evil little game. She first smothers him with her soft palms. Then she sits on his face and after that she makes him smell her. She also rests her feet right on his face. There seems to be no escape and also no mercy for him.