Emma isn't going to say anything either way, because to admit it would be degrading. If you lost your career over it you can speak out, but if you still have a career to lose (or nostalgia over Hermione), you don't. How well do you think people would take it if Harvey raped Hermione was headline news, and how would they treat her, given how many people treat regular rape victims? Even worse if it wasn't rape and it was transactional. This is one thing I can't get mad at her about, even if she did it deliberately. It's social suicide.
Also, if genuinely nothing happened, with those photos a denial is going to sound like protesting too much. Maybe that's why he released them, to make her feel like she had nothing to lose and maybe something to gain because she was already tainted by association by people who knew, which was probably most of hollywood, especially a-listers.