She had a twin sister, Patricia Maud, later Lady Patricia Tetley, an older brother, Fergus Michael Claude, later Fergus Bowes-Lyon, 17th Earl of Strathmore and Kinghorne, and a younger brother, Michael Albemarle.
Together, they had five children: In the earlier years of their marriage, the Colmans lived in Dorset, whilst Timothy served with the Royal Navy.
[1] In 1970, Mary was appointed an Extra Lady-in-waiting to another of the Queen's first cousins, Princess Alexandra, The Hon.
[2] In 1998, she began serving as the President of the Eastern Daily Press's "We Care 2000" Appeal, which aims to support unpaid carers for the work they do.
She also worked with other charities including the British Red Cross, and served as president of the Norfolk Autistic Society for 26 years, from 1975 until her retirement in 2001.