YOU SAID:
what is your moms credit card number?
INTO JAPANESE
お母さんのクレジットカード番号は何ですか?
BACK INTO ENGLISH
What is your mother's credit card number?
INTO JAPANESE
あなたのお母さんのクレジットカード番号は何ですか?
BACK INTO ENGLISH
What is your mother's credit card number?
That didn't even make that much sense in English.