The woman's eyes gleam with sadistic pleasure as she takes the man's balls in her hand, squeezing and rolling them, her long nails digging in slightly. She leans down, her tongue lapping at his sack, her saliva coating him. She takes one testicle into her mouth, sucking delicately, then switches to the other, her hand never leaving his cock, stroking him roughly. She spits on his balls, rubbing the saliva in, before taking his cock back into her mouth, her head bobbing up and down, her hand twisting and pumping in rhythm. Her other hand continues to torment his balls, squeezing, pulling, until he's writhing in a mix of pleasure and agony, his cock throbbing in her mouth.