It's not Rashomon, so we're going to have to assume that everything Humbert says is what really happened, and he, for good or bad, did nothing with her, no matter how interested he was, until she kissed him when he left the summer camp where she had already lost whatever innocence she had left. And all that, if I remember correctly, also happened in the novel. That's why I disagree with your first comment. And I understand that we are not judging the characters, but if there was any change between the novel and the movie, which there was not.