Every mother-in-law is a piece of the devil's pants. (French Proverb)
A party of two is that of God; of three of the king; of four is of the devil. (French Proverb)
The Emperor of Germany is the king of kings, the King of Spain king of men, the King of France king of asses, the King of England king of devils. (French Proverb)
Man is fire, woman is tow, and the devil comes and blows. (French Proverb)
The devil was so fond of his children that he plucked out their eyes. (French Proverb)