His Own Reasons
Supposedly the reason for his failure of marriage stems from Charles feeling like he was forced to propose to Diana. His father, Prince Phillip, refused to let Charles marry Camilla the first time around. The father and son had always had a strained relationship, so it’s no surprise that he forced his own son to marry a woman he didn’t truly love.
With the news of his affair, Diana took a deep breath. She knew what she needed to do.