This storied relationship is explored in a new documentary from Smithsonian Channel,Princess Dianas Wicked Stepmother.
Yet later in life, Diana had a change of hear and Raine became one of her closest confidantes.
So much has been said about Diana, and nobody really knows about her relationship with her stepmother.

Antony Jones/UK Press via Getty Images
Its a very interesting journey.
She was larger than life.
And a very interesting yet complex woman.
She was a survivor, at the end of the day.
Because she had this enormous hair.
No one ever saw her with flat hair or wet hair or un-coiffured hair.
She was an amazing character, almost a caricature.
She didnt realize until later in life exactly how much she did love him and care for him.
What do you think inspired that change of heart?I think it was twofold, really.
So the two women had, at the end, much in common.
She didnt think that was fair, and it needed addressing.
It had been cruel and very hard on Raine.
They mention Barbara Cartland briefly in the documentary.
Diana was a romantic all her life.
As a child she dreamed of finding a prince.
As a romantic as a child, rushed away to boarding school, her escapism was in romantic fiction.
She didnt realize it would be so cruel and hard on her.
Raine being the stepmother, introducing Diana to dashing young men.
She enjoyed the role of being a broker in many respects and loved being involved with the Princess life.
Weve seen Meghan suffering much of the same press scrutiny and abuse as Diana.
Meghan and Harry are so popular.
I think you know your direction.