It's simple, it's intuitive, it's mind blowing. Here it is: carry a body camera. Because you can still face prison time even if there's a lack of evidence. Use Chrome a lot. No, seriously. Let your browser log your history on your computer. If you have a PC, you can use that to prove you never raped her, because you can't be two places at once. If all else fails, then sadly death would be the only thing to bring you justice. Why? Because courts don't care until you die. That's when they review the case. But if nothing fails and everything succeeds, sue her for defamation of character and charge her for attempting to defeat the ends of justice.