Please pardon my intrusion to your dialog with someone else but, I think Charles married Diana to have heirs, and that was all. I may be wrong, but that's just my opinion.
You're right. He was in his early 30's and was getting pressure to produce an heir. It ain't easy to find a virgin nowadays. I think she had unrealistic expectations.
I don't know for sure why he married her. Sounds like another king who messed up things royally. Granted, marrying for love has been an alien concept for centuries.
I still think Diana loved him in the beginning. Under the circumstances, she was a wonderful mother to her children. I will never forget that picture of her on the roller coaster with one of her sons. She wanted to show them what normal life was like. She loved those children.
I don't like to see her memory besmirched by some of the chauvinistic attitudes on this thread. Charles good old boy adulterer gets a pass while Diana is trashed, bless her memory, imperfect creature though she was, like most of the rest of us.