YOU SAID:
We went to the store and saw his mom
INTO JAPANESE
私たちは店に行き、彼の母親に会った
BACK INTO ENGLISH
We went to the store and met his mother
INTO JAPANESE
私たちは店に行き、彼の母親に会った
BACK INTO ENGLISH
We went to the store and met his mother
That didn't even make that much sense in English.