Article continues below advertisementOK! can reveal King Charles' conduct is being re-examined through the lens of his first marriage, with fresh claims one deeply personal dynamic inside his torturous relationship with Princess Diana proved impossible for him to manage and helped accelerate the collapse of their union.Charles, now 77, married Diana Spencer on July 29, 1981, in a globally televised ceremony at St Paul's Cathedral, London, that was widely framed as a modern royal fairytale.