My mother-in-law passed away. Is my mother's family coming?

Your mother-in-law died, and your mother's family will come. Because her mother-in-law died, which is a great event and tragedy in the world. Because the daughter married her in-laws, both families are her children's in-laws. She had to be mourned when her mother-in-law's funeral was held. This is courtesy. On the one hand, it comforts the in-laws, makes them not sad, and on the other hand, it gives her courage and honor.