YOU SAID:

if Mary's daughter is your daughter's mother, who are you to Mary?

INTO JAPANESE

メアリーの娘があなたの娘の母親であれば、あなたは誰ですか？

BACK INTO ENGLISH

If Mary's daughter is your mother's daughter, who are you?

INTO JAPANESE

場合はメアリーの娘は、あなたはあなたのお母さんの娘ですか。

BACK INTO ENGLISH

What if Mary's daughter, you are your mother's daughter.

INTO JAPANESE

もしも、メアリーの娘、母の娘。

BACK INTO ENGLISH

If it's Mary's daughter, mother daughter.

INTO JAPANESE

メアリーの娘の場合は母娘です。

BACK INTO ENGLISH

Daughter Mary is mother and daughter.

INTO JAPANESE

娘のメアリーは母と娘です。

BACK INTO ENGLISH

Daughter Mary is mother and daughter.