I've avoided the influx of fallen angel books so far, but decided to pick up Hush Hush and check it out.
I want a specific spoiler, because if this element isn't going the way I think it is, the book's going through a window. The coach teaching class - is he under someone else's control? Because that's the only sane reason I can conceive of for his brush off answers and BLATANTLY inappropriate behavior in class.
I can suspend my disbelief with the best of them, but if a male coach, in the course of teaching sex-ed, not only allows a male student to humiliate a female student, but then not only shrugs off the same female student's being uncomfortable (when she goes so far as to invoke the school's code) and then forces her to spend EVEN MORE time with the guy she's afraid of... yeah, it's going out a window.
If he's being controlled by an outside force that's making him keep the two of them in close proximity, I'll give it a little (small, infinitesimal, microscopic) amount of leeway (there are such things as principals and guidance counselors who have say in class schedules) but at least it would be an improvement.