I like your story. It's interesting. Original.
What annoys me, though, is you chose to name your bad guys of oall people, a pair of brthers called Tiberius and Gaius. That's not nice. They're good people! Relatively. For Roman dogs, that is. But there are lots of bad people you could name them after, why choose these two names?
s.a.c.
Author's response
Snape's name was Severus so I decided that the Prince family had a tradition of naming their sons after Roman Emperors. Gaius Julius Caesar Augustus Germanicus (Caligula) and Tiberius Caesar Augustus were the two names that came to mind. You can read about their careers in I, Claudius by Robert Graves.