In addition to Elizabeth, Cecily was also patronized by the King's mother, Lady Margaret Beaufort, who helped the princess to protect her rights to the property of John Welles, which once belonged to his father, but became the object of claims by Lionel Welles' daughter from his first marriage. According to John's will, Cecily received for her use four mansions with the right to distribute parishes and beneficiaries (Advowson) and rent from other properties in Lincoln, as well as three estates with a total area of 1540 acres of meadow, pasture and forest land in Essex and rent from other properties in the same district. The princess observed mourning for three years, after which she began to actively participate in the life of the court. She attended the wedding of her eldest nephew Arthur, Prince of Wales and Catherine of Aragon on 14 November 1501; witnesses report that Cecily, who had the honour of carrying the bride's train, was dressed in expensive fabrics, sewn in the latest fashion, and looked more like a marriageable girl than a widow. After the wedding, the court departed for the episcopal palace, where the main celebrations took place. During the jousting tournament, Cecily was present at the queen's gallery along with her sister, the newlyweds, princesses and other noble ladies. At the state dinner given the following Sunday, Cecily sat next to her sister the queen at "the most representative table in the chambers". It is also known that in May 1502, Cecily lent a certain amount of money to her sister. In 1503, Cecily's position was shaken again when Queen Elizabeth died: she lost not only her sister, but also a close friend and patroness, on whose favour she could always count. According to Mary Anne Everett Green, the princess's grief was so great and prolonged that she could not attend the funeral, and although a mourning wardrobe was sewn for her, Cecily's name did not appear on the lists of mourners. Alison Weir suggests that Cecily did not attend the royal sister's funeral because she was out of favor with the king, because of her new marriage concluded without his consent, and if the princess were allowed to see Elizabeth on her last journey, this would mean that Henry VII forgave Cecily. Third marriage Some time after her sister's death, Cecily entered into her third and last marriage: her chosen spouse was