YOU SAID:
I was killed bye my wife’s girlfriend and her husband
INTO JAPANESE
私は妻のガールフレンドと彼女の夫にさようなら殺されました
BACK INTO ENGLISH
I was killed by my wife's girlfriend and her husband
INTO JAPANESE
私は妻のガールフレンドと彼女の夫に殺されました
BACK INTO ENGLISH
I was killed by my wife's girlfriend and her husband
That didn't even make that much sense in English.