In the follow-up sequel fantasy in my head, the King and Queen decide to keep Xanarias as one of their concubines. Having lost her own father, Xanarias finds comfort in the King's embrace and begins to crave his attention daily and obsess over having his child.
But the King is cruel and has refused to let her Barbarian bloodline continue. Every time he has her, as he is about to cum, laughing as she begs him to cum in her, he pulls out and cums on her body, ruining her again and again with his spilled seed.
So one night, after a loud and festive celebration, while the Queen is occupied with the duties of the castle, Xanarias finds the King passed out in his chambers. She slips out of her robes and into one of the Queen's dressing gowns... She climbs on top of the King, who is never a challenge to arouse and slips his hard cock inside of her. She rides him vigorously, as he becomes more and more aware of what is going on. He thinks his Queen is on top of him. He is going to cum. He feels her tight cunt. A cunt he knows so well. He hears her beautiful voice, a voice he has grown to love, and he wants to cum. He needs to cum. The fallen Barbarian princess fucks him, begging for his cum, until the point of no return. Once she begins to feel him spurt inside of her, and she is aware that he is fully present in the moment she begins to reveal herself.
"My King, my Lord, my Master. When you killed my father, were you on top of him like this? Did you wrap your hands around his throat and squeeze like this? Do you think that my father's last thoughts were also of me, just like your last thoughts will be of me and the child you have planted in my young, fertile barbarian womb?"
Or in another more Oedipal ending, she doesn't kill him that day, but gives birth to his son, who she raises to worship her and loathe the King, his father, planting the seeds of revenge in her boy's mind until the day the young bastard Prince rises against his father and takes Xanarias as his Queen and they rule over the kingdom ruthlessly.
Or, something like that. Not that I have thought much about it. ahem... ;)