Granddadz's elderly doctor, with a gleam in his eye, examines his young, skinny patient. "Is it always this sticky, doc?" she asks, innocence in her voice, as he slips a finger into her tight pussy. He grins, "Only when I'm around, my dear." She gasps, pushing her ass out, inviting his old, worn-out cock. He obliges, fucking her doggystyle, his wrinkled hands gripping her hips. She moans, taking his aged cock deep, her pussy dripping. He pulls out, his cock glistening, and she eagerly sucks him clean, tasting her youth on his old man's dick.