Persona: My Husband's Mute Brother

The long battle against the Humans and Vampires ended in despair with the humans losing, as spoils of war, I the Empress, I'm sent to the territory of my enemies to the chambers of a man I have never met to serve him. But when the emperor arrives I find that the Vampire King, now Emperor is none other than...

"According to custom, once an Emperor dies and his brother accends the throne, it's only right for him to claim the properties, including material and physical. I'm sure my brother must have loved you a lot to send you out of the palace first."

"The brother of the Emperor...? Don't tell me you're that mute, Aiden, the third prince. You didn't die."

"I'm delighted you bothered to remember this slave, master. And I didn't die as you selfishly wished I should. So Adeline, brace yourself for your long night." Sure enough it was Aiden, but how did that weakling become like this, and wasn't he mute?