YOU SAID:
Are he and Sie siblings?
INTO JAPANESE
彼とSieの兄弟ですか?
BACK INTO ENGLISH
He and Sie's brothers?
INTO JAPANESE
彼とSieの兄弟?
BACK INTO ENGLISH
He and Sie's brother?
INTO JAPANESE
彼とSieの兄弟?
BACK INTO ENGLISH
He and Sie's brother?
That didn't even make that much sense in English.