This is a tragic story Jeff. The fact that you've took time out to post details on here suggests to me that the events of last year are weighing on your mind. You may even feel some tiny level of guilt, or regret, or remorse right now.
But 44 years is a hell of a long time. You owed her absolutely nothing, especially after the way your marriage ended. You didn't have children together, you had no ties to this woman at all. I hope you don't feel too disheartened by it all, because you have no need to imo.
Stay strong.