A mum-of-three who bravely delayed skin cancer treatments to save her unborn twins died just nine months after giving birth to a healthy boy and girl.
Danielle Dick, 32, died peacefully as she lay next to her husband Tyler in her hospital bed.
She received the shock diagnosis after she suffered headaches and struggled to speak 17 weeks into her pregnancy.
An obstetrician initially thought it was just "pregnancy brain".
But after she was rushed to A&E doctors discovered that she had three masses in her brain, and they were later confirmed to be stage 4 melanoma.
Tyler, from Goddard in the US state of Kansas, is now speaking out to raise awareness about skin cancer and encourage people to protect themselves and get checked.
In 2011, he had noticed a strange mole on his wife's back and a biopsy found that it wasn't cancerous. But the mole grew back and a biopsy determined it was melanoma.
Tyler, 32, told the Today programme the mole and the lymph nodes were removed and it was believed Danielle, a physical therapist, was in the clear.
She gave birth to the couple's first child, a daughter named Taylor, in 2015 and fell pregnant with twins in 2016.
But in April 2017 she became frustrated when she couldn't find the right words. They visited an obstetrician, who told them it was probably "pregnancy brain", said Tyler, a nurse anesthetist.
However, the couple rushed to A&E one day when Danielle couldn't speak at all. An MRI revealed three melanoma masses in her brain.
Danielle would have had a 20 per cent chance of surviving five years if she began immediate radiation treatment, but she chose to delay it so her unborn twins would survive.
She eventually took a chemotherapy pill and underwent some pinpoint radiation.
The twins - a boy named Colby and a daughter named Reagan - were delivered prematurely via Caesarean section at 29 weeks on July 12 last year, allowing Danielle to begin aggressive treatment.
It was too late, however, as the cancer had spread rapidly through her body. Immediate treatment failed to help and doctors later found almost 20 new masses in her brain.
The twins remained in neonatal intensive care until they were strong enough to go home.
She underwent full brain radiation but the cancer spread to her spinal cord, and she was transferred to a hospital in Houston, Texas, for further care as her condition deteriorated.
Danielle died next to her husband on April 25, just nine months after giving birth.
Tyler said doctors will be carrying out tests to find out if the cancer has possibly spread to the twins.
He told Today that his "best friend" was determined to do as much as she could with their three children and remained upbeat, even when she felt ill or exhausted, before she died.
He said: “She never got any breaks. Every time she went to the doctor she got the worst news of her life.
"It was just shocking how they would get one [tumour] to shrink or go away and another would pop up.”
He added: “She loved those babies so much."
She also began ticking things off her bucket list, including swimming with dolphins, going to see The Killers in concert and attending college basketball games.
Danielle's death last month was announced on a GoFundMe page which had raised £28,000 to support her treatment and raise awareness about skin cancer.
The page said she had taken a "turn for the worse", adding: "The leptomeningeal disease spread faster than anyone was expecting.
"There was enough time that family was able to make it to Houston to spend time with her.
"Tyler was laying with her when she passed peacefully.
"We are all heartbroken and devastated and can’t imagine a life without Danielle.
"Please keep us all in your prayers as we try to navigate a life without her, especially Tyler, Taylor, Reagan, and Colby."