Misty Mild, the prim and proper librarian, finds her world upended when Alex, a patron with a hidden kink, demands she be punished for a fictional infraction. He bends her over, her pencil skirt riding up, revealing her curvy ass. He spanks her, his hand leaving a rosy imprint. Misty, aroused, takes his cock into her mouth, her blonde locks obscuring her face. She sucks and jerks him off, her hand slick with spit. She then rides him, her pussy stretched around his big cock. Alex's firm grip on her ass guides her movements, her moans echoing in the quiet library. The session ends with a messy creampie, Misty's ass filled with Alex's hot cum.