Well Jacob, if you think you have a connection with her then may be you should. Because as it is, she does not have anyone and you two had a good relationship once upon a time as you have mentioned. Though it was an illicit one, it could now be fruitful. Find out if she suffers from guilt for having had that relationship with you while she was married to someone else. Talk things out and work things out, your differences in age could also mean a difference in your individual aspirations, you need to be careful regarding this too.