Advice kindly appreciated

How do you deal with your s/o being separated or divorced? There is a child but he is not in his life by request of his wife. We have to deal with her occasionally if we see her in public. He talks to her more openly then he does with me. It doesn't make me jealous. I understand they shared a lot over the years and went through a lot together. I do dislike when we see her in public and she always calls herself his wife in my presence even though they split off several years ago