We are really close friends with a couple. Wife is a BM in her best friends wedding, but Husband is refusing to go because he despises the Groom. Wife says this might be unforgivable and she doesn't know how she will got over it. Her father and sister as well as a few of her aunts will be at the wedding. She and the bride have been like sisters for most of their lives. She is upset because she sill be embarrassed to be there without her husband.
So I wonder how your FI/Hubby would handle this situation and how you would feel about it FI' desicion not to go.