A logic problem by Tammu Triveni

Someone's mother's daughter could either be themselves or their sister. Someone's son is called, quite obviously, their $\boxed{\text{son}}$ . Someone's sister's son is called their $\boxed{\text{nephew}}$ .

Mothers husband = Father. Your mom and dads child is either you or a sibling. Your son = son. A sibling's son = your nephew

It is perfectly possible for your mother's husband's daughter to be no relation at all, it happens a lot when two people who marry have children from previous relationships.

Mother's husband is her father. Mother's husband's daughter is she herself or her sister. And Mother's husband's daughter's son is either her's son or her nephew

maybe she is talking about her own son and it is also possible that she is referring to her sister'son. So, the answer is 'either son or nephew'

Sibling son is nephew

Mother's husband = Father; Father's daughter = 1. Sister or 2. Yourself; 1. Sister's son = Nephew; 2. Your son = Son.