You may bring a lawsuit for malicious/wrongful prosecution against her, compelling her to provide evidence to support her assertion, and supporting your case with affidaivts from friends demonstrating that you are a person of good moral character. Your attorney will have an opportunity at trial to cross-examine her, impeach her, and prove her untruthfulness. If she is found lying while testifying, she might face the criminal charge for perjury. In addition, if you win the case, you are entitled to monetary damages.