There's a possibility that she's older than claimed. She seems to have been born as Dorothy Agnes Dines. Her 1940 census, 1943 marriage, and 1950 census records all support 1913, but there's a "Dorothy L Dines" (with a different mother than in 1940, and a father, whereas no father is enumerated in 1940) enumerated in 1920 and 1930 and recorded as ages 10 and 20, respectively. Don't know if this is her but I can't find any other matches.