[5] In 1923, Cathleen was married to Henry "Harry" Cooke Cushing III (1895–1960) in the Italian Gardens of the Ambassador Hotel.

Before their divorce in 1932,[a] they lived at 26 East 96th Street and were the parents of Henry Cooke Cushing IV (1924–2000),[14] a polo player and investor who was married to Georgia Walters "Georgette Windsor" (born 1924), Ruth Swift Dunbar (1932–2010), Rosalba Neri (born 1938), and Laura Alvarez.

[15] In August 1932, ten days after her divorce from Cushing, she married CBS radio executive Lawrence Wise Lowman (1900–1980) at the court house in Hempstead, Long Island.

[1][b] On October 9, 1940, she married for the third and final time to Antonio Martin Arostegui (1911–1986), the publisher of PM, the only English afternoon newspaper in Havana, Cuba.

[18] After a two month illness, Cathleen died at the Anglo-American Hospital in the Vedado district of Havana on January 25, 1944, two days after her 40th birthday.