Shemp's granddaughter proves the corollary to Musclesman's Law: The uglier the great grandfather, the more beautiful the great granddaughter.
Muscleman's Law, discovered by Sgt. Ernest Bilko (Phil Silvers) states: The uglier the brother, the more beautiful the sister.
The whole episode is hilarious, but go to 10:35 to hear more about Muscleman's Law. Bilko later in the episode admits he made it up.