YOU SAID:

I need one hundred dollars in order to fight my sister's boyfriend's father's second wife.

INTO JAPANESE

私は妹のボーイフレンドの父親の二番目の妻と戦うために百ドルが必要です。

BACK INTO ENGLISH

I need one hundred dollars to fight the sister's boyfriend's father's second wife.

INTO JAPANESE

私は妹のボーイフレンドの父親の二番目の妻と戦うのに百ドルが必要です。

BACK INTO ENGLISH

I need one hundred dollars to fight the sister's boyfriend's father's second wife.