Let's be completely honest in 1984/85, if I was 18 and had a teacher like that (unwed) hit on me and offer up herself to me, you don't think I would have been all over that? Most of you would have as well. Consequences? You're the "stud" around school for nailing a hot teacher. There's nothing but win for the male student. Sorry, it's just the way it is.
In this case, her being married to the football coach (whom I was deathly afraid of) would have been a singular deterrent from me engaging in said activity.