Doreen was born on 1936 or 1937 in Watford, Hertfordshire, England, UK. She married Donald Alfred Hornsblow, with whom she has a son Keith, in 1968. The family lived in Braughing, England.
Doreen began her publishing career at a Fleet Street newspaper in London, where she thrived in the hectic atmosphere. She started writing after attending an evening class and sold her first novel to Mills & Boon in 1977, she published her novels under the pseudonym Sally Wentworth. Her novels were principally set in Great Britain or in exotic places like Canary Islands or Greece. Her first works are stand-alone novels, but in 1990s, she decided to create her first series. In 1991, she wrote a book in two parts about the Barclay twins and their great love, and in 1995, she wrote the Ties of Passion Trilogy about the Brodey family, that have money, looks, style, everything... except love.
Doreen was an accounts clerk at Associated Newspapers Ltd. in London, England, and accounts clerk at Consumers' Association in Hertford, England. In 1985, she was the founding chair of the Hertford Association of National Trust Members, and named its life president. She also collected knife rests and she was member of The Knife Rest Collectors Club.
Doreen Hornsblow died from cancer on 30 August 2001, at 64 years of age.