A divorced woman that lives near my dad thinks her husband cheated on her with me and now she is harassing me!?

I drive by to go to my Dad's house and she gives me the finger. She's sent me nasty messages (at first I didn't even know who it was). She's spreading my name through the dirt because her marriage fell apart and she wants to blame it on me. I have dealt with her husband for work but swear on my life we never had more than a business relationship. She tells him all the time how she is going to tell the entire industry how I ruined their marriage? I have told her that I don't have any interest in her husband and to get phone records, etc. to see so for herself but she won't give up? I'm worried about my reputation...so should I confront her or just leave it alone? Maybe she'll look worse than I do if she keeps it up?