The slave's balls ache, his cock throbs against the unforgiving cage as he services his mistress, her moans echoing through the room. She commands him to watch as she fucks herself with a dildo, his cock straining against the bars, desperate for release. "You'll never have relief, slave," she hisses, "You exist only to serve me." He whimpers, his body covered in sweat, his mind a whirlwind of humiliation and desire, fully under her dominion.