Let's analyze the statement step-by-step: The woman says:
“His mother is the only daughter of my mother.”
- "My mother" refers to the woman's mother.
- "The only daughter of my mother" means the woman herself (since she is the only daughter of her mother).
- So, "His mother is the only daughter of my mother" means His mother is the woman herself.
Therefore, the woman is the boy’s mother.
Conclusion:
The woman is the boy’s mother.