A devastated family is in mourning after losing a daughter just weeks after the sudden death of her brother.

Kirsty Smith, 26, died after collapsing in her boyfriend's home on Saturday.

Just seven weeks earlier she'd been the one to discover her brother Mark Smith wasn't breathing, TeessideLive reports.

She tried to save him by giving CPR until an ambulance arrived, but sadly the 36-year-old was pronounced dead by paramedics on November 28.

Kirsty Smith, 26, died after collapsing in her boyfriend's home
Kirsty Smith, 26, died after collapsing in her boyfriend's home

Kirsty's family said they had been left shattered by the two siblings' sudden deaths.

Dad Stuart Gellatly, 71, said: "Kirsty was a caring, beautiful, sincere, lovely person.

"She did have a heart of gold. She tried to save her brother Mark. She was working on him, giving him the kiss of life.

"Mark had pancreatitis and he had so much mental illness. He was in the RAF and he had two beautiful children.

"He had lovely qualities and was a gifted cartoonist. He was such a very funny young man. He loved a laugh and he was a very caring and loving father to his two children."

It is not yet known how Mark and Kirsty died.

Mark Smith was discovered not breathing seven weeks earlier
Mark Smith was discovered not breathing seven weeks earlier

Kirsty grew up in Redcar, North Yorkshire, with Mark and her two younger brothers Adam, 25, and Scott, 24.

She was also close to her sister Karen, 49, and her brother Andrew, 47, from her dad's previous relationship.

Her mum Angela died when Kirsty was only 10, and she went on to study at Teesside University where she played for the women's rugby team.

Kirsty also worked across Teesside as a door woman for Aventus Security.

Stuart, who is stepdad to Mark and dad to Kirsty, Adam and Scott, said: "Before she became poorly she wanted to be a door woman so she did the badge.

"She would be there sometimes dancing with the customers. She had so much respect off the lads."

Stuart said that Kirsty battled mental health issues and was being treated by Foxrush House in Redcar.

Kirsty (left), Adam (middle) and Mark (right)
Kirsty (left), Adam (middle) and Mark (right)

On the day Kirsty died, she was supposed to meet her brother Adam but did not return home.

Stuart said he knew something wasn't right after failing to get in touch with his daughter over the phone.

The retired builder said: "I had gone to sleep and there was a phone call from a policeman. He said 'Stuart I would like to talk to you'.

"He came in and he told me she had died - they thought it was a massive heart attack.

"I spoke to her boyfriend Jamie and he said that they had been watching films together and had a good day. To me, it was nice to know she had found a bit of happiness before she did pass away.

"She touched everybody's heart; she was such a lovely person. We were so close it's unreal. I am going to miss this young lady so much."

Adam's partner Kara Baker has set up a GoFundMe page for Kirsty's funeral and has so far raised more than £2,000.

On the fundraising page, she describes Kirsty as a "beautiful soul" and a "well-loved" daughter, sister and auntie, adding that the family are "utterly broken" following the death of both Mark and Kirsty.