My Husband, The Secret Emperor

Vivian and Aria Everhart are born in Veridia. A monk prophesies one will be Mother of the Realm via Alliance Marriage. King favors Vivian, neglects Aria. Veridia needs an Alliance Marriage. King and Concubine Rhodes scheme: Vivian to Qinor, Aria to Wastes. In Wastes, Aria discovers the lord is Emperor Alexander Valerius. They fall in love, return. Aria is humiliated. Bansai rescues them, sends troops. Veridia is conquered. Aria becomes Mother of the Realm. Concubine Rhodes regrets.