Lady Sarah McCorquodale, aunt to Princes William and Harry and one of the late Princess Diana’s older sisters, has been seriously injured following a horse-riding fall, according to her brother, Earl Spencer. The 70-year-old was hospitalized after the accident and has been described as a “quite a handful” patient due to her strong-willed nature. Earl Spencer shared that Lady Sarah, who once dated King Charles and introduced him to Diana, remains spirited despite her injury.

Earl Spencer contrasted Lady Sarah’s personality with that of their other sister, Lady Jane Fellowes, who is described as sweet and funny. While no specific details about Lady Sarah’s injuries were disclosed, the family continues to honor Princess Diana’s memory, with Earl Spencer recently marking the anniversary of her death by sharing flowers from their family estate, Althorp.