Just a medical reality check - IF she had acquired an STD, hasn't had further contact with OM, and you tested once and were negative - that STILL doesn't mean she couldn't give you an STD. No STD is 100% transmissible in any one sexual contact. So until SHE has been tested, you still might be risking contracting an STD from her. Some (like herpes and HIV) may be asymptomatic. So I would recommend, from a strictly medical point of view, that you should not have unprotected sex with her without HER getting tested first.
