Delphine's firm grip on the sub's hair guides his cock, slamming it into her mouth and down her throat. Her free hand squeezes and slaps his balls, drawing moans of pain and pleasure. She pauses to spit on his dick, lubing it up for another round of intense throat-fucking. The sub's body tenses, fighting the urge to come, but Delphine senses his struggle and slows her pace, allowing him a moment's reprieve before resuming her dominant assault. The room echoes with the wet sounds of her mouth working his cock, interspersed with her harsh commands and his desperate pleas for release.