Title: Fall of the Dragon
Characters: Wise Masters [Master(duh) - WIlling], Danerys Targaryen [Slave - Unwilling], Missandi [Slave - Unwilling]
Genre: Slavery
Type: Natural
Description: She'd failed, her dragons were dead, her allies were dead, and now Danerys was a prisoner of the wise masters, along with her beloved aid, Missandi. She expected that they too would soon die, she should've known better. Of course they'd be that cruel, once she was their prisoner, of course the slave masters would make the woman who freed a thousand slaves into a slave herself.
Title: Unsuitable
Characters: Khal Drogo [Master - Wiling], Danerys Targaryen [Slave - Unwilling]
Genre: Slavery
Type: Natural
Description: Viserys made a miscalculation in his plan to sell his sister to Khal Drogo. As she grew up, Viserys treatment of Danerys molded her into the kind of wife he would want; meek, submissive, biddable. Many lords would accept such a wife, but Khal Drogo did not; in a Dothraki horde, the Khalesi must be a dominant figure, subordinate to her Khal, but still strong enough to rule the horde if the Khal was called away, the weak little girl the begger king threw before him, Drogo knew right away that she wasn't fit for that role.
Danerys breathed a sigh of relief when she was rejected by the Khal, but she too made a miscalculation; Drogo judged her unfit as a wife, but submissive and beautiful women did have a place in the horde; as slaves. That night the Dothraki raided the manse; Viserys, the magister and the male servants were killed, the three eggs were left abandoned, to be discovered eventually in time, by who, and what they did with them... well that's another story.
And Danerys, along with the more attractive female servants, they became slaves of the Dothraki Horde.