Freeze in Your Regret, Lynx King

Seven years Ione bled to burn the frost curse out of the Lynx King's veins. The day Victor is free, he plans to marry Layla, the woman who once left him to die, hiding it in a tongue he thinks Ione cannot speak. She understands every word. So she walks into the snow, and the servant they called worthless turns out to wield a white witch's power.