Fall from Grace — a series by Eddie Davidson

Set in the Civil War era, this tells the tale of a Georgia Plantation where most of the men have died off, the slaves were freed and the planting has to continue. It contains an element of pony girls/bdsm kink. The fall from grace is a long one and the return even longer. There may be a few liberties with the true story here - but this is a real location in Clinton Georgia and the characters are based on real people.