The Dragon's Wife: A Dragon Shifter Romance (Falling For a Dragon Book 4) - Falling For a Dragon, #4

Eager to learn how to control her powers, Kate and Ros venture into the kingdom of his family. There they stumble upon a mystery lurking in the dark waters of the realm. However, trouble waylays them on their journey to the capital as they find themselves part of a hunting party after a notorious Pactus. Their friend Brother Collins is grievously, and magically, injured in the fray, and only through the help of Ros' princely brother do they manage to make it out in one piece.
Mostly. Their travels take them across the country where they find themselves as guests to the court's seer, an old woman who once predicted that Ros would kill the very brother who now travels with them. She warns them to be wary of their travels ahead and sets them off with their friend healed but still carrying the curse. At the capital they part ways with the elder prince and go in search of answers to their many questions.
They discover that they're not the only ones asking questions, and in their investigation they uproot a deadly plot against the city. Together Kate and Ros must stop them, all the while fighting against friend, foe, and fate.