YOU SAID:
my sister told me she'd chop off my arm in my sleep with my cousin, I would die
INTO JAPANESE
姉はいとこと一緒に寝ている間に腕を切り落とすと言った、私は死ぬだろう
BACK INTO ENGLISH
My sister said she would cut off her arm while sleeping with her cousin, I would die
INTO JAPANESE
姉はいとこと寝ている間に腕を切ると言った、私は死ぬ
BACK INTO ENGLISH
My sister said she would cut her arm while sleeping with her cousin, I would die
INTO JAPANESE
姉はいとこと寝ている間に腕を切ると言った、私は死ぬ
BACK INTO ENGLISH
My sister said she would cut her arm while sleeping with her cousin, I would die
That didn't even make that much sense in English.