I saw this in RT. Now RT is Russian and not to be trusted, but I confirmed it with Newsweek, which cites Encyclopedia Dramatica's cutting edge 2007 reporting for many of the details, supplemented by Wikitubia. (I can't get through to ED at present ... if they're going to be publishing news, they need a CIA second-in-command to tell their boss what to do like any other mainstream outlet. Until then I have to try back in a few minutes.) They say she drew pictures of herself having sex with some of her friends to prove she was straight. Now, this was before she came out as a transsexual - and of course they call her as a she back then, just as when she raped her mother - so I'm not sure she proved she was straight with male friends or female friends. Obviously she didn't prove herself straight when raping her mother ... I think. I don't know, I'm so confused.
More of this is true than you can possibly imagine.