In 1908 she married the Liberal journalist Charles Masterman, who was later elected to parliament and briefly served as Chancellor of the Duchy of Lancaster.

She was the eldest daughter of General Sir Neville Lyttelton and his wife Katherine Sarah Stuart-Wortley.

In 1918, together with Elizabeth Lee, she published Wives of the Prime Ministers 1844-1906,[3] and in 1939 followed this with C. F. G. Masterman: a biography.

She was creditted with being tougher than her husband and her near minister status made her a confidente of LLoyd George.

[1] At the 1929 General Election, two years after her husband’s death, Masterman was the Liberal candidate for the Conservative-held seat of Salisbury.