YOU SAID:

if she does not do what you desire; her sister you shall aquire

INTO JAPANESE

彼女があなたが望むことをしない場合;あなたが取得する彼女の妹

BACK INTO ENGLISH

If she doesn't do what you want; her sister you get

INTO JAPANESE

彼女があなたが望むことをしない場合;あなたが得る彼女の妹

BACK INTO ENGLISH

If she doesn't do what you want; her sister you get