You posted this before. Why are you repeating it?
Camilla is sick, according to the Palace. At her age, a heavy cold can have significant respiratory complications and requires careful watching and management. I'm surprised you're unaware of that.
The author's name is Sally Bedell Smith, not "Sally Beddell Smith". As for her claims, I seriously doubt Camilla cares much about what she's called. Charles cares, but Camilla has never struck me as the type who would. By the way, she'll be queen consort regardless of what she's called. She is now, after all, the legal Princess of Wales because her husband is the Prince of Wales.
No Charles and Camilla do not live separately. Charles helped her buy Ray Mill House before their marriage. It is where she can get away from royal life and see her children and grandchildren in a relaxed, non-royal environment. If I were in her position, I would want to do exactly that. She didn't grow up royal, unlike Charles. I've no doubt she really needs a break from time to time.