There once was a good mother-in-law but the wolf gobbled her up.
More French Proverbs:
One knows not for whom he gathers.French
Ill-luck is good for something.
French
A fool is always beginning.
French
Who spits against heaven, it falls on his head.
French
Whosoever draws his sword against the prince must throw the scabbard away.
French
One always returns to one's first love.
French