Why not continue to honor her even though we are no longer compatible as marriage partners?
Why give her less honor than I would give any woman in any situation just because I happened to have been married to her?
In fact, to honor her less would be an insult to my own ability to select a marriage mate in the beginning. Perhaps she was the perfect choice for me at the time but is no longer.
I choose to honor her as a I would any person, and to honor her so as to serve as an example to my children.