She was the daughter of Thomas Barton Watkin Forster and Emma Stewart (born Galbraith), a landscape-painter, of Holt Manor, Bradford-on-Avon, Wiltshire.
Her father was an amateur painter who had exhibited since 1859[1] and he and his daughter would go on sketching trips to locations that included France and Wales.
On 3 June 1884 she married Samuel Hill Smith Lofthouse who was a barrister who went on to be an honorary secretary to the Bar Committee and an assistant recorder.
[3] She only briefly exhibited under her married name as she died on 2 May 1885 in Lower Halliford on the Thames during childbirth.
Her brief career was marked by an exhibition of 26 of her works later that summer[1] and a brief obituary in the Dictionary of National Biography.