"I'll celebrate her birth when..."

You're right, she was brought up on the fringes of the royal circle.
Unlike Kate Middleton.

Must read posts more carefully, I read it as 'her sister dated Charles the First'

rose

The Middletons' expressions were a world away from the ear to ear grins after George was born.

Strange really because I had a grin like a Cheshire cat when our first grandchild was born.....and for the second and third etc., etc.

More than the fringes surely if the queen attends your parents wedding and is godmother to you brother, you granny is very close to the queen mother , her father was an equerry to the queen and her father. Brought up at Sandringham, holidayed in Balmoral , if there was truth that Charles was involved with a woman Diana never heard of it!