Susan, a salope from Marseille, brings her stepson to her libertine side. She schools him in the art of pegging, slipping a strap-on dildo into her ass, and teaching him to rim her hole. Her dirty talk, a mix of French and explicit English, fuels their passion. He soon takes over, fucking her ass with the strap-on, then his own cock, as she begs for more. Their taboo tryst leaves them both spent, but Susan, the insatiable milf, is already plotting their next French porn adventure.