Fly on the Wall — Trista Russell

You would have to be a fly on the wall to learn of the secret love affair between Paige, a divorced English teacher, and Theo, a high school student and star basketball player. You will be a fly on the sizzling-hot walls when this flirtatious and lustful duo takes risks during detentions, school dances, and games. However, once in her bedroom, he teaches the lessons and she becomes the willing and ready-to-learn student.
What happens when her ex-husband, who happens to be his coach, walks in on them?