Many years ago in a secondary school in Tuen Mun, there were a young couple. They were both teachers. But then the husband had an affair with a female teacher in the same school. That female teacher was also married. The wife and many other colleagues, and even some students, knew about the affair, but the wife did not want to get divorced. The female teacher then left the school but the affair continued for a couple of years.
A school is just like any other offices. Anything can happen! And teachers or any other well educated people are not more superior than others morally.