Rape man can go be crucified for all I care I'm just relieved that the possibly fake pregnancy and the lip stick on sensei got him to lay off for a little while. He is genuinely terrifying and I don't think a single thing would make him be sympathetic after all the very... Real violence he's done in this story.
But its unfortunate that these breaks for sensei are probably just a small gap until all hell breaks loose. That girl is setting her and the student up for something and I'm horrified to think in this kind of manga what it would be. What could be worse than we've seen, lord knows I hope we don't see her or the student driven into such desperate situations that they attempt suicide.