A little boy is performing on stage. Pointing him, his father, seated in the audience, told the woman sitting next to her, "The boy's grandmother's husband is your husband's wife's daughter's grandmother's husband." How is the woman sitting in the audience with the mother-in-law of the man who is the father of the boy performing on stage?

• A. Daughter
• B. Daughter-in-law
• C. Sister in law
• D. Granddaughter