In 1972, Susan caused a stir in society circles by leaving her family to move to
Argentina with professional polo player
Héctor Barrantes. Her daughters were then raised by their father Ronald with the help of extended family. Susan and Ronald divorced in 1974, and in 1975 she married Barrantes. Susan and her new husband moved to the ranch-manor "El Pucará" in
Tres Lomas, Argentina. In her writings and filmographic work, she recorded that aside from the birth of her two daughters, her life in Argentina was the happiest time of her life personally and professionally, since she had the chance to explore and develop a documentary film career that combined her two passions, polo and film. She also assisted her husband's business of breeding polo ponies and cattle until his death from cancer in 1990. Widowhood brought financial difficulties for Susan, and she once again decided to start afresh. Selling more than half the farm to the polo-playing Australian media magnate
Kerry Packer, she relocated to a large flat in the
Recoleta-Palermo borough of
Buenos Aires and set up a television production company, making films about horses. Susan remained firm friends with Prince Charles, who contributed a foreword to her book
Polo. ==Death==