YOU SAID:
She is not her mother
INTO JAPANESE
彼女は彼女の母親ではありません
BACK INTO ENGLISH
She is not her mother.
INTO JAPANESE
彼女は母親ではない。
BACK INTO ENGLISH
She is not a mother.
INTO JAPANESE
彼女は母親ではありません。
BACK INTO ENGLISH
She is not a mother.
You've done this before, haven't you.