The Voss Brothers' Contract Wives

Two Harrington sisters agree to a paid contract to play the wives of the wealthy Voss brothers, with the money going toward their orphanage. The tougher sister is assigned to tame the playboy younger brother, while the chattier sister is tasked with reaching the autistic older brother. Once their work is done and they are ready to walk away with their bonuses, the brothers flatly refuse to let them leave.