When Cybill Troy catches her slave peeking at her ass as she changes, she decides to teach him a harsh lesson by giving him entirely too much of exactly what he desires the most, his one obsession and addiction: her perfect, round ass in his face. His obsession with his Mistress's backside soon turns to fear as he's smothered out beneath her, unable to move as she grinds into his face as her seat, depriving him of oxygen as well as his scarce sense of dignity.