Nerdy girl with glasses kneels over grandpa's lap. Sucks his cock deep, glasses fogging up. Slides down onto it reverse cowgirl style. Ass cheeks clap against his thighs. Couch shakes under them. She rides hard, ponytail swinging. He grabs her waist, pulls her deeper. Tits bounce free from her top. Pussy grips tight around his shaft. Grinds until he's ready to blow. Pulls off for a messy cumshot across her glasses. She licks it clean, grinning.
