As I said before, try talking about something you know about.
https://www.rd.com/article/why-charles-didnt-marry-camilla-first/
The question was tackled in Sally Bedell Smith’s biography, Prince Charles: The Passions and Paradoxes of an Improbable Life. According to Bedell Smith, right from the start Charles adored the then-Camilla Shand, who’s close in age to Charles (Diana was 13 years younger) and has always treated him as an equal rather than as someone she idolized. However, the royal family wasn’t interested in having Camilla as its princess. For one thing, she was perceived as an “experienced” woman, which was a nonstarter for the royal family back then in terms of a suitable spouse for Prince Charles. For another, she wasn’t perceived as “aristocratic” enough to be a princess, according to The Duchess: Camilla Parker Bowles and the Love Affair That Rocked the Crown by Penny Junor.