Since so far, her actions have all been consistent with a woman who supports her husband, I assume this latest decision was in response to a request from a source she couldn't ignore, i.e., Buckingham Palace.
Poppycock! If Camilla was so insistent on supporting Charles, she would have been content to remain a discreet mistress. Instead she had to put herself front and foremost in the wife's position, even while Charles was still married to Diana.
What Diana would have had to 'accept' was not just a normal 'bit on the side' on her husband's part (which is bad enough ) but
a) a woman who took over her house as soon as she was out of it ,
b) bossed the servants ,
c) went through her things ,
d) knew all her friends and stayed with them with Charles as a couple ,
e) laughed about her behind her back ,
f) always called her 'that ridiculous creature ' ,
g) briefed the Press (Stuart Higgins of The Sun ) on anything she could find out to hurt Diana for 10 years .
h) Huge parties thrown by the husband for the mistress with all their friends invited
So that public humiliation and rejection and lack of support in the position of Princess of Wales was the main problem - not so much that Charles chose to 'play away'. Really Diana was in an IMPOSSIBLE position, and that is due more to Camilla's machinations, and lack of support for Charles' position.
I assume this latest decision was in response to a request from a source she couldn't ignore, i.e., Buckingham Palace.
No doubt, Camilla has ignored many requests from Buckingham Palace in the past.
She's never given the impression of a person who seeks the limelight or the approval of the public.
Ah, think again. According to Diana, Camilla said something like this to Diana, ~~"Why should you care if I have Charles, you have the adoration of every British man". This gives some indication of where Camilla's priorities were. Another indication I have of Camilla's love of the limelight, is all the bling she wore on her visit to the US which was a bit over the top.