まさか惚れたんですか。認めん、認めんぞ。あの男を義弟になるなんて、僕は絶対いやです！
You haven't fallen in love have you!? I won't have it! Having that man become my brother-in-law; I absolutely hate that!

唐突な質問に彼は泡を食った。
He was confused by a sudden question.

とうとう、良い考えが浮かんだ。
At last a good idea struck me.

彼は私と弟を取り違えた。
He mistook me for my younger brother.