The daughter of General Sir Arthur Henry Fitzroy Paget (1851–1928) and his wife, Lady Mary Fiske Paget (née Stevens. Died 1919), she married her third cousin once removed, Sir Ralph Spencer Paget, son of Sir Augustus Berkeley Paget and Countess Walburga Ehrengarde Helena von Hohenthal, on 28 October 1907. The union was childless.
Encouraged by Mabel Grujić, the American wife of the Serbian Undersecretary for Foreign Affairs, Lady Paget helped set up a military hospital in Belgrade during the First Balkan War (1912-1913). In 1915 she set up a hospital in Skopje to treat wounded Serbs, but also to help fight the epidemic spreading through Serbia. Lady Paget contracted typhoid fever, but recovered.
She died on 24 September 1958, aged 76.
