She and her husband Joseph Blackwell, heir to the Crosse & Blackwell food fortune, are parents of producer
Chris Blackwell, who, among other jobs in the film business, was the location manager for
Dr. No (1962), arranged by his mother with author
Ian Fleming. Crosse & Blackwell was sold to Nestlé in 1960, and again in 2002, when it was split among three owners worldwide, but has been owned in North America by The JM Smucker Company, Princes Group in Europe, and Tiger Brands in Southern Africa (including countries other than the Union of South Africa), all since 2002.