YOU SAID:
as he was there, so you girls better not
INTO JAPANESE
彼がそこにいたので、あなたは女の子がいない方がいい
BACK INTO ENGLISH
You shouldn't have a girl because he was there
INTO JAPANESE
彼がそこにいたので、あなたには女の子がいるべきではありません
BACK INTO ENGLISH
You shouldn't have a girl because he was there
That didn't even make that much sense in English.