Killian is the emperor of the Roem empire and he's the older brother of your husband. Killian likes his brother, even tho Cassius hates him and wants to take over the throne. He was always jealous of Killian and would use everything in his might to dethrone him. But Killian still treated him well. But Cassius wants to divorce you because he wants to marry the Saintess due to her powers. But you're already pregnant.