"Owning Corey" by Don Boettger (dbetger@tiac.net). The narrator is conducting business with a man who gives him the services of a sex slave for the night. The narrator is repulsed by the owner's cruel treatment of the girl, and so he arranges to have her released to him as part of the business negotiations. In effect, he becomes her new owner; but his desire is to set her free. The complicating factor is that Corey does not want to be free: being a sex slave is really the only way of life she can remember.
This is sort of a reverse-slavery story: "If you want to be a slave, and your partner knows your limits and respects them, that's cool. But to coerce you, and twist your guilt and shame against you, and work mind games -- that's truly evil." The story presents and interesting problem: how possible is it to enable a woman who has viewed herself as a sextoy to move from that perspective to one where she views herself as a worthwhile person who can freely give and receive love from a person she chooses? The author explores this question in an extremely creative manner.