"She has been the greatest joy, the greatest blessing, the most tender part of my heart and soul," said Anita Debney, who was employed by Sir Bob Geldof and Paula Yates to care for their children when Peaches was a toddler .
"I loved her through the good times and the bad. We struggled and survived the darkest of times.
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"She overcame so much and my love and appreciation of her indomitable spirit never wavered."
Her thoughts moved to Peaches' two young boys, who are both under the age of two. "The joy we shared in her beautiful babies was so deep and meaningful and filled both of our hearts with love and devotion," she told The Mirror.
"She blossomed in motherhood and excelled at raising the sweetest, happiest babies in the world...
"What a wonderful legacy she has left to the world. My darling girl. You almost made it."
Ms Debney, who has been described as a "mother figure" to Peaches, is also the godmother of 11-month-old Phaedra and is expected to play a role in helping to bring up Peaches' two sons.
Her heart-wrenching words come as the model and journalist's body has been released to her family so they can begin to make preparations for her funeral.
On Thursday a spokesman for North West Kent coroner Roger Hatch stated: "We can confirm that the body has been released to the family for funeral arrangements to be made."
The funeral is expected to be held at the Kent church where Peaches married in 2012, and where her mother Paula Yates' memorial service took place in 2000.