The Duchess says that she can use this information to her advantage .
Celia tells the Duchess that Lactantio secretly hates Andrugio ( it is not clear how she gained knowledge of Lactantio 's inner thoughts ) .
The Duchess says that Lactantio can use this information to Lactantio 's advantage .
Celia tells the Duchess that Lactantio secretly hates Andrugio ( it is not clear how she gained knowledge of Lactantio 's inner thoughts ) .