I went for Unwilling To Begin With. Most of my favourite stories on this site have a sub who's caught up in things against her will, and over the course of the story he or she struggles with the fact that they're starting to enjoy first the physical stimulation of the forced sex, and then gradually coming to enjoy the actual humiliation of being forced. Ya can't go wrong with a story of a poor innocent who's reduced to greedily wallowing in degradation.
Rallan