Mistress Amy has a big ass and she loves to smother. She does it for fun and not because someone has done something to piss her off. She has a lovely ass and it is what she uses as bait to get people to smother. They love her ass and want a piece of it and they get that piece by licking and smelling it while she smothers them with it.
Mistress Sheena did not like how this guy behaved. She had to teach him proper manners and she did so using her ass. She teased him and she got him to relax and trust her. Then she turned on him and she smothered his face using her ass. She laughed at him as he begged for mercy but she took that chance to teach him some manners which he had no option but to learn.