I said he was in love with her, not that they had sex.
And there is absolute zero evidence he was even "in love" with her, despite the fact that Nietzsche left thousands of correspondences (including with his family) for us to examine as evidence. Zero evidence their relationship was anything but familial. Moreover, the best word to describe their relationship would be
forbearance- while he loved her as family, and corresponded with both her and his mother throughout his life, they were hardly close. Both Nietzsche's sister and her husband, Forster, were proto-Nazis, and Nietzsche opposed and despised what they stood for- so despite being his sister, Nietzsche had essentially no respect her.
In any case, this just sounds like an attempt to demonize and discredit a writer who is highly controversial- the same way people try to discredit Freud as being gay, discredit rock stars as being devil worshippers, and so on. Not to mention, one last time, that
even if he had had an inappropriate relationship, this would be irrelevant to his writings- which are widely acknowledged as being some of the finest, most insightful, and most influential of ANY writer in ANY period of time.
So much for you "crazy homeless guy" BS.