 Edmund was also Margaret's heir to the Earldom of Lincoln and also her other extensive estates that included the third of the Earldom of Pembroke that she had inherited from her second husband in 1248.Edmund was never able to become Earl of Lincoln, however, as he predeceased his mother by eight years.As the widowed Countess of Lincoln "suo jure", Margaret was brought into contact with some of the most important people in the county of Lincolnshire.