The marriage caused a rift with the King , who considered it a mismatch .
Was the catalyst for the Royal Marriages Act 1772 , which forbade any descendant of George II to marry without the monarch 's permission .
The marriage caused a rift with the King , who considered it a mismatch , and was the catalyst for the Royal Marriages Act 1772 , which forbade any descendant of George II to marry without the monarch 's permission .