I agree that if Sarah received the same amount of money as Diana received in her divorce settlement, Sarah would have blown that money as fast as she received it. She's a chronic spendthrift...
I agree with everything you say. Sarah was in the wrong so she would never have had the upper hand, also she would never have got a divorce settlement equal to Diana´s, just two reasons among many, one is that she was at fault and second she was NOT married to the Prince of Wales. Sarah was married to a younger son and not to the direct heir to the throne.
Sarah misbehaved, I can imagine her as a child and then as a young woman, doing outrageous things and then smiling all dimples and everything would be made better and up to a point at her age she still manages to do this and everyone throngs to do what they can for that sweet little Sarah but she went one step too far and involved her husband in her latest money making scheme, and not only involved him, managed to bring him into the public eye as being behind the scheme and he had suggested the money she should demand, this came at a time which was very bad for him as he had been under criticism for his role as Trade Ambassador or whatever and being give the sobriquet of Airmiles Andy. I must say he lost a lot of my respect when he answered the question what qualified him for the job and he said that "it was genetic" or words to that effect.
The involvement, of course, has been denied, and is no doubt true, but it appeared on the video and will always put doubt into the minds of some people.
I am sure she is bubbly and all her friends love her, but she just went too far and was caught out. It won´t make much difference though, she will never have to go through the difficulties that other lesser beings will have to, she will always be looked after and any money that is directly handled by her will disappear as quickly as the other fortunes she went through.
I find it a shame, I think she is the epitome of that saying "she is her own worst enemy".