The Queen and Crown Prince

Queen Cecilia of England was betrothed at the age of five. She was betrothed to the eldest son of the king of France, Prince Alexander. It was a trade deal. England needed the army, and France needed the money. England had the money while France had the men. Ever since then, she was bound to Alexander. Couldn't be with any one else. Wasn't allowed out of the deal. What happens when she sees someone else? Who gets hurt?