Sounds like you've done everything you can so far. Keep in mind she could be trying to set you up for a complaint or your employer for a lawsuit $$$. With your supervisor advised, avoid her unless its work related and then keep the conversation professional. Don't bring it up again or make it an office scandal. It's hard to do but shows your not creating or contributing to a hostile work environment. Watch your back and cover your lower back.....
Great advice. I was already thinking about "laying low" for a bit.