" Martha spoke again. “In case you’ve forgotten, here are the rules, Beast, laid out by all the sisters: You must love her and that love must be returned with true love’s kiss, before your twenty first birthday. She may use the mirror as you do, to see into the world beyond your kingdom, but she must never know the details of the curse or how it’s to be broken. You will notice she sees the castle and its enchantments differently than yourself. The most terrifying aspects of the curse are reserved for you. "
― Serena Valentino , The Beast Within (Villains, #2)