A woman says, ‘The boy is the son of my mother’s only daughter.’ If the woman has no sisters, how is the boy related to the woman?

Question

A woman says, &#8216;The boy is the son of my mother&#8217;s only daughter.&#8217; If the woman has no sisters, how is the boy related to the woman?

Accepted Answer

Son. The woman's mother's only daughter is the woman herself (she has no sisters) .  So the boy is her own son