Although her parents aggressively opposed
Lord Berkeley's claim to the disputed estates for some years, including laying siege to Berkeley castle in 1422, a settlement was reached in 1425 following the death of the countess and the birth of a son to the earl's second wife. The dispute was reignited in 1439, when Margaret's father died and Lord Berkeley seized possession of properties that had been conceded to the earl in 1425. Shrewsbury and Margaret's two brothers-in-law, the
Duke of Somerset and the
Baron Latimer, vigorously opposed the breaking of the 1425 settlement. Although the brother-in-law were prepared to agree a settlement, the dispute was maintained by the Talbots and once again became violent with Margaret taking an active role. In 1451 Margaret's son
John captured Berkeley castle and took Lord Berkeley prisoner. Margaret took the initiative in the ensuing legal settlement, by which Lord Berkeley under duress conceded property and was required to enter into substantial
recognizances. The following year when Lord Berkeley's wife Isobel appeared on his behalf at court in Gloucester, Margaret had her seized and imprisoned in Gloucester castle. where she died shortly after. Following her husband's death in 1453, Margaret was drawn into a dispute with her stepson
John Talbot, 2nd Earl of Shrewsbury over his father's attempt to divide his inheritance between the issues of both his marriages. In 1457 her stepson and Lord Berkeley came to an agreement, which was sealed by the latter's marriage to Lady Joan Talbot, Margaret's stepdaughter. In 1463 Margaret and Lord Berkeley agreed that they would mutually drop all legal actions against each other. Margaret was buried in
St Faith under St Paul's at London. ==Ancestry==