The Dragon King's Girl Guard

Erin disguises as a man to serve Dragon King Kael for healing crystals. She hides two secrets: she's a woman, and Locke, the half-dragon son she raised alone, is Kael's. As Kael seeks his fated mate, he falls for his "male" servant. Facing exposure and dragon laws, Erin protects her son, awakens her magic, and becomes a queen changing dragon law.