Nah, he did not 'do nothing'.
He very much did something so so sooooo much worse. He uses her body as she was being graped as a fapping material literally right after the fact. Who in the right mind wouldn't count that as a betrayal of trust?
Lol, my bad. Only just now I realized that your comment is about the weird morality of the common reader's stance that SA is absolute evil, yet torture to death is good shit.