The Courtesan and the Gladiator by phantisma

The Courtesan and the Gladiator - phantisma

An excellent erotic fanfic with Jared cast as a gladiator and Jensen as a courtesan (pleasure slave), both selected by Lord Jeffrey of the House of Morgan. When Jensen is offered as a prize for a successful fight, Jared is overwhelmed by the gentle courtesan.

Source: http://archiveofourown.org/works/592156?view_full_work=true