A naughty high school reunion

It had been five years since Sarah had approached these big wooden doors. They were closed and ringing the doorbell gave her an odd feeling. They used to stand wide open, letting everyone in; unless you were late of course. Then you would’ve had to ring the bell and head to the secretary’s office to explain yourself before going to class. She knew she wasn’t going to receive a scolding or a note for her parents today, but still the feeling persisted as she made her way past the office, through the main hall to auditorium one.
All the chairs and tables were gone, safe for a few that were filled with bowls of snacks and half-empty glasses with drinks. It surprised her how small everything seemed, not as big as she seemed to remember. She recognised many old classmates and friends and wondered why she had never really kept in contact with any of them. In college she had made new friends, friends with whom she had more in common and made her forget her high school friends. Still she tried her best talking to most of them, the conversation the same every time: How have you been, what did you do after school, do you have a boyfriend yet?
Her teachers seemed most interested in her studies and what she was going to do in the future. She was just talking to Mr Stevens at the make-shift bar the school had provided. Unlike the rest, he was just as she remembered him. He had been very young when she was in his class and in five years he had grown even more handsome than before. Sarah had never swooned over her high school teachers like some of her friends – most of them over Mr Stevens – but she did have that secret crush long ago. It felt odd addressing your ex-teachers as if they were equals now, she kept referring to him as Mr Stevens, even though she knew his first name was Michael. Bored of the repetitive discussion of the future, they were chatting about their past. “I’m glad you choose to study architecture Sarah.” He said. “I remember you were always one of my best students.”
It was true, Sarah always got good grades in mathematics. “Well, I can remember you standing in front of class, tapping that short wooden ruler in the palm of your hand when you were angry. That was usually when someone did something very stupid.” Sarah replied, she had never been very comfortable with receiving compliments. “I always thought some day, you were going to spank someone with that and it wasn’t going to be me…” She blushed deeply as she realised what she said. The words had come out without thinking, as a joke. But in fact it was a fantasy she had kept secret and almost forgot during her years with ugly college professors.
Luckily Mr Stevens only laughed at her joke. “Wish I could Sarah, sometimes I think some of you make those mistakes on purpose, just to torture me.”
Sarah smiled, she wanted to steer this conversation back to a more normal discussion. But that naughty part of her that had been awoken by the memory was curious. “So you do imagine more imaginative punishments for your students than that extra homework that you used to hand out?”
Mr Stevens smiled back at her. “No Sarah, I think that would be quite inappropriate. First of, all of my students are under-age and secondly, it would be a gross abuse of my power as a teacher to do, or think about doing something like that.” Sarah blushed, she shouldn’t have gone past the joke and now he must think she was weird. After a short silence he continued: “You seem disappointed.” Sarah laughed and immediately felt better, knowing he could still joke about it too. Time to talk about something else she decided, but she wasn’t given time. “You know, you’re no longer a student of mine and not under-age either.” Mr Stevens said with a grin. Sarah blushed scarlet. “Oh relax.” He said. “I’m only teasing you…”
Sarah smiled and with courage she didn’t know she possessed she looked up at him and said four words: “Well, now I’m disappointed.”