Question

A lady says to a man ,"Your father is the father in law of my father's only child.How is the man related to the lady?​

Answer 1

https://plaza.rakuten.co.jp/sportsjp/diary/202103310000/

https://plaza.rakuten.co.jp/sportsjp/diary/202103310001/

https://plaza.rakuten.co.jp/sportsjp/diary/202103310002/

https://plaza.rakuten.co.jp/sportsjp/diary/202103310003/

https://plaza.rakuten.co.jp/sportsjp/diary/202103310004/

https://plaza.rakuten.co.jp/sportsjp/diary/202103310005/

https://plaza.rakuten.co.jp/sportsjp/diary/202103310006/