sentences:  The marriage was an act of diplomacy and they had only one child, his successor Ferdinand Charles, Duke of Mantua and Montferrat (1652–1708).The relationship between husband and wife effectively ended, and Charles continued a relationship with a noblewoman Margherita della Rovere, and also had affairs with men including the castrato Atto Melani.In his book "The Last Medici" Harold Acton records that his death occurred in the midst of lascivious intercourse.