Invite your son-in-law to a fowl, and he will take away the lemon.
More Spanish Proverbs:
The beginning of health is to know the disease.Spanish
He who knows nothing is as blind as him who cannot see.
Spanish
God give you luck, my son, for little wit must serve your turn.
Spanish
A bad day never hath a good night.
Spanish
If you have a friend who is a doctor, make your bow and send him to the house of your enemy.
Spanish
A fair-weather friend changes with the wind.
Spanish