The law is to prevent a teacher who has authority over a student to take advantage or coerce a student into doing something he or she might not want to do.
“The law is to prevent a teacher who has authority over a student to take advantage or coerce a student into doing something he or she might not want to do.”
How could the students be coerced or intimidated into a relationship? All they would have to do is report it and she becomes a felon.