It was indeed sad Derxa and I say that as someone who wasn't that much of a fan.
That summer she was undoubtedly behaving ludicrously and I also didn't like the way she'd behaved in many situations - having affairs with married men, harassing their wives, barging in on open heart surgery.
However, she was very badly treated by the Royal Family and her own family and could not let her desire for revenge go. That might have been foolish of her, but I can't say that I would not have felt the same in her shoes. She had been divorced a year or slightly less, had conceded the loss of her HRH title and was always going to be tied to her ex and MIL because they are the Royal Family, not an ordinary family.
It's irrelevant to say she had not seen her sons for a month. Does anyone really think she was neglecting them? I think they'd give short shrift to anyone who said that to their faces. They were on their traditional holiday with their father and grandmother. How could she object and more to the point, why should she? By their accounts she was looking forward to seeing them the day after she ended up dying.
This is yet another backpatting MN thread sneering about dreadful plebs.
And I'm still laughing at the person who pinpointed Diana's most egregious moment of disobedience as being the time she took her curlers out too early on her wedding day 