YOU SAID:
Then why do you do their work for them?
INTO JAPANESE
あなたはなぜ彼らのために自分の仕事をしていますか?
BACK INTO ENGLISH
Why are you doing your work for them?
INTO JAPANESE
なぜ彼らのためにあなたの仕事をしていますか?
BACK INTO ENGLISH
Why are you doing your work for them?
You've done this before, haven't you.