Gail Baker's dying wish has been granted, with her sister set to travel to Australia from New Zealand to care for her in her final days.

The news comes after her sister, Christine Archer, had four previous applications to the Department of Home Affairs rejected.

The department is authorised to grant an exemption to "those who have a compelling and compassionate reason to travel to Australia urgently".

After a fall in her Bowraville home on the New South Wales Mid North Coast in March, Ms Baker was diagnosed with advanced ovarian cancer and told she has just weeks or months to live.

She said she was extremely relieved her sister could travel and be with her.

"I'm very, very happy that Christine can come over, she's obviously going to have to quarantine in Sydney most likely for two weeks, but at least she'll be in the country and she's closer to getting here," Ms Baker said.

"It means everything."

Sisters to be reunited after six years

A retired New Zealand based nurse, Ms Archer, said being able to travel to Australia to be with her sister was a huge relief and she had flights booked.

"I am so happy and so relieved that they are granting me permission to come in," she said.

"I just want to spend every minute I can with her, it will be just wonderful."

"We haven't seen each other for six years, we have an awful lot of catching up to do, and time is limited and every day is precious."

Nurse sister to facilitate end-of-life wish

Ms Baker's only daughter, Erica Peterson, had regularly travelled hundreds of kilometres between her home in Uralla, in the New England region, to assist her mother at the Bellingen Hospital palliative care unit.

While Ms Baker is home for now, Ms Peterson said it was uncertain how long she would be able to remain there.

She said the news that her aunt could now come to Australia and help care for her mother was wonderful.

"We were very excited when we found out this afternoon," Ms Peterson said.

"It'll be a much nicer way to end her life rather than in a hospital with people she doesn't know."

Ms Archer and Ms Baker both looked after their mother in her final days.

"I'm just hoping I have a nice peaceful end like mum did," Ms Baker said.

Government process needs improving: family

Ms Archer said achieving permission to travel to Australia from New Zealand, with borders closed due to the pandemic, had been a long process.

"To get to this point it has taken me six applications, numerous different documents that were needed, it's just been such a huge job, it really has," she said.

Ms Peterson said the process for applying for exemptions needed to be improved.

"It's ridiculous, and I totally understand that COVID-19 is a big concern for people, but there's no reason why Christine couldn't have been here on a plane three weeks ago," she said.

"The Government needs to change the way that they look at these applications … rather than a one-rule-fits-all [approach].

"I think they really need to have a bit more heart and think about people's lives."

The ABC has contacted the Department of Home Affairs for comment.