The Lost FireBender ~Zutara Child~

Usra was the hidden love child of Zuko and Katra, One they hardly spoke of but Zuko kept her hidden so Aang wouldn't ever know the secret between his newly founded best friend and his love. Ursa lived in the palace of the fire nation passing off as the child of Mai and Zuko, but when Azula catches wind of her brother's mistake, soon the whole nation shall know of Zuko's first born. The true heir to the throne.