[2] Margaret was introduced at a young age to the circle of the Princess Charlotte of Wales, to whom she became attached and a close confidante; and this position raised a rumour against her (which, however, she was able entirely to refute) that she betrayed the Princess's secrets to the Prince Regent.
[2] On 20 June 1817, at Edinburgh, Margaret married Charles, Comte de Flahaut, aide-de-camp to Napoleon, who had been educated in Britain, where he took refuge during the Bourbon Restoration.
The Comtesse held a prominent place in society since her husband held office under King Louis-Philippe I and later under Emperor Napoleon III, and was ambassador to Vienna, and (1860) to the Court of St. James's (London), and finally resided at Paris as Grand Chancellor of the Légion d'Honneur.
[2][3] She was a prolific and perspicacious letter writer, and much of her correspondence is held at the Archives nationales, in Paris.
[4] The Comtesse died at the Palais de la Légion d'Honneur in Paris, on 11 November 1867.