The story continues in this book.
The peace has been made. Tentative moves are also made to unite the avians and the serpientes. Some are successful, some are not.
But the royal couple is expecting a heir and it is dubious that the races will accept a mix blood as future ruler. Who will raise the child: serpiente or avians?
But the child of a cobra and a hawk is a less certain equation. The serpiente don't mind having a hawk as Naga so long as their Diente is pure cobra — the Naga's power is always second to her mate's. But they aren't fond of the idea of a feathered Diente. They are even less fond of the idea that any half avian child could choose an avian mate, leaving the serpiente throne ruled entirely by birds."
"They might tolerate a mixed child as your heir if he or she is raised serpiente, and if they are assured that its mate will also be serpiente, but…" She trailed off, not needing to say what the other side of the problem was: Danica's court would feel the same way. They would want a daughter to be given an alistair — an avian alistair. Even if the child was male, avian tradition would demand that he be betrothed to a suitable avian girl within his first few years of life.
Serpiente are more passionate, while the avians are more reserved; one are hot and the other strive to be cold...
"Danica, do you know what you are asking of me? Giving up my child to the Keep, to be raised by strangers, to sleep in lonely silence, to be taught to be ashamed of what she feels and what she is… and to be betrothed before she can even speak, before she can possibly understand love."
Another heir in the future could solve the problems: one ruler for the avians, one ruler for the serpiente and peace mainained by sibling holding the thrones. But the problems get more complicated when an attack insures that this will be the only heir: Danica will not have other children... Poor woman... :(
This is just one problem. Falcons appearence is another. Their threats are serious and disrupt the already complicated situation.
Rei is uncovered as heir to Falcon throne and Kel is also a falcon in disguise.
Their love is not apparent until the end, but it is bitter-sweet as she's ready to sacrifice herself, just to be with him... even in death.
Some lore is explained here by Valene and at the end the solution to the main problem is found in founding a new court: Wyvern's Court, where avians and serpiente will live mixed together and where the mixed blood child will be accepted as ruler.
We'll see in the next books how that will work! :D