Grandma's wrinkled hands, stained with age and wisdom, wrap around her grandson's young, throbbing cock. She jerks him off with a vigor that belies her years, her gnarled fingers tracing the veins of his shaft. She leans in, her breath hot on his ear as she whispers filthy nothings, making him buck his hips and fuck her fist. The room fills with the sound of flesh slapping against flesh, and the scent of sex and grandma's faint perfume.