Sophia Dorothea held a longtime ambition to arrange a double marriage of her eldest son, Crown Prince Frederick, to Princess Amelia of Great Britain, and her eldest daughter Wilhelmine to Frederick, future Prince of Wales. This was a project that had first been raised during the children's infancy and would result in a strong alliance between Prussia and Great Britain. Her plan was opposed by the king's favorites Grumbkow and Anhalt, who wished to arrange a marriage between Wilhelmine and Anhalt's nephew, Frederick William, Margrave of Brandenburg-Schwedt (the King's first cousin). He was next in line to inherit the throne after the crown prince, whose health was delicate. If he succeeded, Anhalt and Grumbkow hoped to come into a position of power.