The secret desires of a classroom writer

A young woman sits in a classroom, surrounded by male colleagues. She’s wearing a black pullover and a dress without underwear. As she writes, she discreetly uses one hand to stimulate herself, her face showing clear signs of pleasure. A man approaches, inserting his fingers into her vagina, focusing solely on that area. She moans in pleasure, continuing her writing. After some time, she speeds up her masturbation, then slows down, all while maintaining a lustful expression. Finally, she spreads her legs wide, and a man enters her anus.