My Sister Swapped My Phoenix Egg For An Ash Raven

Lyla and Sera Bluefeather both married into the Phoenix royal family and became mothers around the same time. Their households have always measured each other closely, and the rivalry between the sisters sits at the heart of the story. The source premise is brief, so the opening sets up a royal court where a sister's betrayal over a precious egg threatens to reshape the family's future. The conflict is the bitter bond between Lyla and Sera, and what Lyla is willing to do once the balance of power turns against her.