 Beyond her husband's business and her charitable foundation, Simone Del Duca continued to own and operate their Haras de Quétiéville thoroughbred horse racing stable and stud farm in Biéville-Quétiéville, Calvados.Located in the Basse-Normandie region, an area famous for its many important horse farms, she bred horses that raced at the Deauville racecourse.Her colt, Herbager won the 1959 French Classic, the Prix du Jockey Club, and was named French Champion Three-Year-Old Colt.