«Maid for Milking» by Vanessa de Sade

It's 1939.  The Great Depression still ravages the Kansas plains, and young Lizzie Ljunggren has just given birth.  But, fecund and full-breasted – and possessed of the sweetest milk in all the state – it isn't long before Lizzie's in the service of the black-veiled Mistress, owner of a mysterious organisation called The Farm, which lists human milk as one of its many ‘services.’