Marcus grins as he watches her leave, then leaves shortly after, headed for his lunch.
Marcus kept her same routine up everyday for the next few days, making her wear the toy to the school and have it on low all day. He'd see her and lunch and at the end of the day to give her her reward of an orgasm, then send her home. Then he changed it, cutting her lunchtime reward out completely and only seeing her after school in her class room. It had been like this for the last few days, he was quite enjoying her reactions, the prolonged exposure to the toy was slowly getting to her.
He steps into the class room after school, he had watched her through his class with her and had kept a neutral face, now after school, he walks up to her. "Hello Professor..." He smiles kindly at her.