Belle Knox, the brainy bombshell, uses her wit and charm to seduce her student. She discusses philosophy, but her eyes linger on his crotch. She unzips his pants, revealing his throbbing erection. She sucks him off expertly, her tongue swirling around his shaft. She fucks him missionary, her big tits bouncing with each thrust. She reverses, her tight asshole winking at him. He pounds her, her screams of pleasure filling the room. She cums hard, her body convulsing. He pulls out, cum dripping from his cock onto her waiting tongue. She swallows, a smile playing on her lips. "That's what I call a passing grade," she purrs.