In 2003, Deborah Maddison, 26, was given just two hours to live after she suffered acute kidney failure.
Her life was saved by her dad, Alan, 57, who donated his left kidney after tests proved he was a match.
However, 10 years on, Deborah has been given the heartbreaking news that her dad's kidney is failing – so this time mum Audrey, 52, has stepped in to save her daughter's life.
Deborah said: "I'm eternally grateful. I am really close to both my mum and dad, and love them very much.
"There's not really a bigger gift. It is like all my Christmases and birthdays rolled into one. They haven't even had to think twice about it. For the rest of my life I will appreciate what they have done.
"I am scared of what's ahead but have amazing friends and family who help me stay strong.
"I just want to live a normal life. I would love to get back into my modelling full-time. Despite my scars I love modelling swimwear."
Deborah's life was turned upside down when she had chest pains in 2003. Her kidneys were failing and magistrates' clerk Alan was operated on immediately at Leicester General Hospital.
One year later Deborah, of Sleaford, Lincs, was diagnosed with osteoporosis, which left her with the skeletal structure of a 92-year-old woman, heart problems, high blood pressure and high cholesterol.
But she continued modelling and reached the final of a swimwear contest. Just before Christmas doctors revealed her father's donated kidney was failing and another transplant was needed.
Audrey will be operated on next month. The mum, who has two other daughters Samantha, 29, and Danielle, 20, said: "Any parent would do the same thing. You do anything for your kids. She's incredible."
Deborah is appealing for more people to join the NHS Organ Donor Register.
She added: "It can change people's lives, like mine."We hope the operations are a success.