You still call her your mother in law or if you were divorced you would call her your Ex- mother in law.
No, you would call him your recently departed husband, or your deceased husband.
Your mother's sister's husband is your uncle, but his mother is not related to you.
Your mother-in-law. Or, call her by her name.
You can call her by her first name or if your comfortable some son-in-laws call them mom.
Sarah Black
Your mother's sister is your aunt. Her husband is your uncle.
Unless you are in a polygamous marriage, you are your husband's wife, so you would call her your mother.
Your mother's husband's sister is your mother's sister-in-law. Her sister-in-law's husband is not related to your mother, but is her husband's brother-in-law.The most common ways of referring to him would be "my sister-in-law's husband" or "my husband's brother-in-law."
You daughter's husband's mother is your daughter's mother-in-law. The English language has no term for a relationship between you and your daughter's mother-in-law.
Mother, if you mean wife of the deceased husband.
husband thief
How do you refer to the spouse of a deceased spouse? Deceased husband is John Doe; surviving spouse if Jane Smith. For example, "please attend a dedication honoring John Doe, ? husband of Jane Smith.