YOU SAID:
My wife's brother's sister has just married a man.
INTO JAPANESE
私の妻の兄弟姉妹はちょうど男と結婚しました。
BACK INTO ENGLISH
My wife's brothers and sisters just married the man.
INTO JAPANESE
私の妻の兄弟や姉妹の男と結婚しただけ。
BACK INTO ENGLISH
Just married the man of my wife's brother and sister.
INTO JAPANESE
ちょうど私の妻の兄と妹の男と結婚しました。
BACK INTO ENGLISH
Just married the man of my wife's brother and sister.
You should move to Japan!