The marriage of Bouvier's parents was strained by her father's alcoholism and extramarital affairs; the family had also struggled with financial difficulties following the Wall Street Crash of 1929. They separated in 1936 and divorced four years later, with the press publishing intimate details of the split. According to her cousin John H. Davis, Bouvier was deeply affected by the divorce and subsequently had a "tendency to withdraw frequently into a private world of her own". When her mother married Standard Oil heir Hugh Dudley Auchincloss, Jr. , Bouvier and her sister did not attend the ceremony, because it was arranged quickly and travel was restricted due to World War II. Bouvier gained three step-siblings from Auchincloss' two previous marriages, Hugh "Yusha" Auchincloss III, Thomas Gore Auchincloss, and Nina Gore Auchincloss; she formed the closest bond with Yusha, who became one of her most trusted confidants. The marriage later produced two more children, Janet Jennings Auchincloss in 1945 and James Lee Auchincloss in 1947.