The only way Charles can be KING is if Camilla's ex-husband dies before they get married. To be KING you can't marry any divorced women. Catholic woman are also out of the picture if Charles is to be KING.
Charles will never be KING.
Line of Succession List below:
Roman Catholics or those married to Roman Catholics are automatically excluded.
In the top 52...
(DOB)
1. HRH The Prince Charles, The Prince of Wales (1948)marriage to a devoiced women.
2. HRH Prince William of Wales, eldest son of The Prince Charles (1982)
3. HRH Prince Henry of Wales, younger son of The Prince Charles (1984)
4. HRH The Prince Andrew, The Duke of York, second son of HM Queen Elizabeth II (1960)
5. HRH Princess Beatrice of York, elder daughter of The Prince Andrew (1988)
20. Lady Davina Windsor (1977), daughter of Richard, Duke of Gloucester
21. Lady Rose Windsor (1980), daughter of Richard, Duke of Gloucester
22. HRH Prince Edward, Duke of Kent (1935), son of George, Duke of Kent
George Windsor, The Earl of St. Andrews (excluded himself from succession by marrying a Roman Catholic)
Edward Windsor, Baron Downpatrick (1988), son of George, Earl of St Andrews - excluded himself by becoming a Roman Catholic
23. Lady Marina Charlotte Windsor (1992), daughter of George, Earl of St Andrews
24. Lady Amelia Windsor (1995), daughter of George, Earl of St Andrews
Lord Nicholas Windsor (1970), son of Edward, Duke of Kent (excluded himself by becoming a Roman Catholic)
Charles can marry Camilla and become King in what is known as a Morganatic marriage in which the children of the marriage are denied succession to the throne. Since Camilla is close to 60, that is not on the table.
Prince Philip is not King, even though married to the Queen , so it doesn't seem unusual.
They are obviously very much in love,all these 35 years, and share much in common. I think is's great that someone in his position chooses a real person, and not some plastic, siliconed young airhead to share his life with.