Should I reach out (I don't really want to though but would it be decent)?

I had a toxic friend that I cut out last year. She was quite awful. She had a terribly attitude, was ungrateful for anything you did, she thought she was the best thing since sliced bread. And when we had our falling out, she proceeded to tell my entire family what a bitch I was over Facebook and even to my husband. I absolutely dreaded hearing from her and after our falling out I even had to block her on Facebook because she'd stalk my page and start fights with me whenever someone would tag me in stuff.

Anyway my hubs, who is a car salesman, told me she came in today. Her and her husband (who got married two weeks before we did) are getting a divorce. Reason? She cheated on him and he beat her for it.

I don't want to be friends with her again. I really REALLY don't want to be friends with her. But do you think that I should at least send my regards?