Tina Brown, Paul Burrell and Andrew Morton et al, could hardly be called reputable sources however, there is absolutely no situation in which I would find your statement at best, distasteful and at worst, utterly repugnant!
I could not disagree with that statement more. When I met them when they visited NZ I can only say what I saw with my own eyes. He was riveted by her as she smiled and charmed her way around the assembled people with her incredible charisma. To me he seemed absurdly proud and totally besotted. I am sad that their relationship did not mature into something more lasting but I have no doubts personally, that at that time, he was as in love with her as she was with him.