YOU SAID:
why did you kill your brother last week at the cottage by the lake, dear?
INTO JAPANESE
先週、湖のほとりのコテージで兄弟を殺したのはなぜですか?
BACK INTO ENGLISH
Why did you kill your brother in a cottage by the lake last week?
INTO JAPANESE
先週、湖のほとりのコテージで兄弟を殺したのはなぜですか?
BACK INTO ENGLISH
Why did you kill your brother in a cottage by the lake last week?
That didn't even make that much sense in English.