An ex-teacher fucking her ex-student in the contrast to her angelic purity built carefully up until this moment - is an awesome twist that also downgrades the anachronistic main character to the overall context. (Gosh, this review is just like another smart-ass anecdote picked by Jude but which didn’t make the final edit.)
So to end this in a right way, let’s use an actual quote from the film: “The more innocent they are, the more they deserve to die (B. Brecht)”