In 2013, Kris made a film for BBC Three and, over the following decade, continued to allow the cameras into her life.
The new BBC Two film tells her story – from her early years to her final days – surrounded by Maren, Lady Marmalade and her friends.
“She wouldn’t want us to look back and think how tragic it all is, because that’s not how it was,” says Maren.
Kris was keen for death to be a conversation alongside living, says her sister, but the film – a celebration of Kris’s life – shows her “in all of her colours”, she says, and with all of the things that meant so much to her.
“It was about the simple things as well and it’s the contentment in her life that she was so keen for people to understand,” Maren explains.
“There was nothing left unsaid and nothing left undone, which I think is a pretty great place to reach when you’re at the end of your life.”