Short answers, pulled from the story.
Lady Mary Talbot was born as the eleventh child of George Talbot, 4th Earl of Shrewsbury. Her paternal grandparents were John Talbot, 3rd Earl of Shrewsbury, and Catherine Stafford, while her maternal grandparents were William Hastings, 1st Baron Hastings, and Katherine Neville.
Mary Talbot petitioned for an annulment in June 1532 on the grounds that her husband had a pre-contract with Anne Boleyn. She argued that her marriage to Henry Percy was invalid because he had already promised his heart to another woman before their union.
Henry Percy died on the 30th of June 1537 after succeeding his father as the 6th Earl on the 19th of May 1527. Mary Talbot remained a widow for over thirty years until she died on the 16th of April 1572.
Mary Talbot was suspected of being a Roman Catholic and a favorer of Mary Queen of Scots during the reign of Henry VIII. She was accused of hearing mass in her own house, a dangerous act that could have led to execution under the Protestant establishment.
Henry Percy was the heir to the Earldom of Northumberland and the son of George Percy, 5th Earl of Northumberland. The marriage of Mary Talbot and Henry Percy was designed to secure the alliance between the Talbots of Shrewsbury and the Percys of Northumberland.