"Who is to separate us, pray? They'll meet the fate of Milo!"

 

Milo of Croton
Public DomainMilo of Croton - Credit: Joseph-Benoit Suvee

Cathy is referring to Milo of Croton, an Olympic wrestler and soldier of the 6th century BC, who died whilst attempting to tear a tree apart with his bare hands. They became trapped in the cleft of its trunk and he was set upon by a pack of wolves. 

Crotone is a small city in Calabria, Italy.