The aroma of perfume and sweat filled the air as Lady Cathy, a gorgeous plus-sized woman, strutted confidently into her office. Her voluptuous figure almost seemed to sway with each step as she made her way towards her plush leather chair. With a satisfied smile on her lips, she eased herself down onto the seat, adjusting her ample cleavage to give her breasts just the right amount of support. Meanwhile, her slave cowered in fear near the other end of the room, quivering at her presence. He knew what was about to happen and didn't dare refuse when she crooked her finger at him, gesturing for him to come closer. With shaking hands, he approached his mistress, unsure of what horrors awaited him but knowing full well that he deserved whatever punishment she decided to dish out. As he came within striking distance, Lady Cathy leaned back in her chair, inviting him forward with a malicious grin. Slowly, she brought her ample backside up off the seat until it was hovering just above his face. Her ass cheeks gently bounced as she savored the power she held over him. Without warning, she lowered herself down onto his face, pressing his entire head between her plush cheeks. She shuddered with pleasure as she felt his warm breath brush against her sweaty skin. With her hands planted firmly on either side of his head, she began to rock and grind against him. She was relentless in her efforts to smother him with her incredible weight. The slave felt his lungs burning for air as she continued to smother him, but he dared not breathe or move any part of his body lest he incur her wrath. He could feel her moaning softly above him, promising that this would be the punishment that would finally break him. As sweat dripped down from her body onto his face, he couldn't help but wish for just one tiny whiff of fresh air as her ass squeezed even tighter around his head. The sensation of her skin rubbing against his lips and nose felt almost too much for him to bear, but he knew that it was a small price to pay for the pleasure she derived from his suffering. As the minutes stretched on, he began to lose track of time and space, his existence reduced to nothing more than the feel of Lady Cathy's ass smothering every inch of his body. Finally, after what felt like an eternity, she pulled herself away, leaving the slave gasping for air. She sat back in her chair, admiring her handiwork as her chest rose and fell rapidly from her exertion. "That," she croaked, her voice hoarse from pleasure and exertion, "was a truly satisfying punishment." With a final, malevolent grin, she gestured for the slave to stand up and bow before her as she prepared for her next conquest. As he struggled to his feet, he couldn't help but wonder how long it would be before his body could recover from her latest torture. But then again, he thought with a shudder, maybe he didn't really want to know.