Complex sentence: His father would later marry Marie Emilie Thérèse de Joly de Choin in a secret marriage in 1695, however she was never "Dauphine", as Philip's mother had been, due to the union being morganatic.
Split into simpler sentences: His father would later marry Marie Emilie Thérèse de Joly de Choin in a secret marriage in 1695. She was never "Dauphine" as Philip's mother was due to the union being morganatic.