I saw all the pics of her wearing a foam prosthetic theatrical belly of various sizes throughout her alleged pregnancy.
Yes it did fold up on a couple of occasions which of course a real pregnancy doesn't allow.

Why she did it is unknown to me. I just know she was flat bellied one day and donning a big 6mo size pregbelly the next then back down again depending on the event and clothes she wore. She might wear a full term size one day and down to a 4 mo size over to a six month size worn upside down with the big part on top and the smaller part on bottom. Go into the bathroom and switch it around and come back out with it the other way and falling out from under her clothes. It was weird and obvious which added to the oddity.

To say that they "changed" the birth certificate is very strange news. The parents can't change it, can they? So either she was never on it, and it is being used a press attention or the foyal ramily did it for their own reasons.
She never had a baby with Harry physically it does not appear. She did have one with some guy when she was a teen that was apparently raised by Samantha. She has a book out today. Of all things.