Dave, I am cracking up laughing here. Please do not torture yourself over this woman any longer. You have NO idea if she was truly HD or simply playing a very dangerous game with a married man.
I have been HD since I hit puberty (20+ years ago) and I have never, once, showed my panties to a man (let alone a married man) in night school or anywhere else. I have always conducted myself with class and, yet, I am no prude either.
So don't feel like your choices in life are: a loving and respectable wife, or a semi-stalking, promiscous-acting nutcase. In fact, her actions speak to me of someone who is temporarily HD....she was perhaps acting out over some traumatic event in her life. I mean, does YOUR high level of desire cause you to do crazy things to strangers? Most likely not. It is just a quiet presence that is always, always there like your heartbeat.
There is a good chance that this young woman was out to "prove" something to herself or to someone else. I wouldn't give her another thought. I am sure that she would have lost interest in you just as soon as the divorce was final and her power was diminished.
But, really, what I wanted to say is that if you are looking for women who look or act a certain way, in hopes that they are HD, you will be sorry!