YOU SAID:
why are you bringing my sisters cat home
INTO JAPANESE
なぜあなたは私の姉妹猫を家に連れてきます
BACK INTO ENGLISH
Why do you bring my sister cat home
INTO JAPANESE
なぜあなたは私の妹猫を家に持って帰るのですか
BACK INTO ENGLISH
Why do you bring my sister cat home
You've done this before, haven't you.