Shari Fietje fell to her death while using a treadmill
A little boy lay next to his dead mum thinking she was asleep after she fatally fell from a treadmill.
His dad Jamie Fietje said it was hard to understand what happened to his wife after speaking to Astin, 4.
Shari Fietje, 29, died on December 3 at the family's New Zealand home after apparently falling from a treadmill, likely because of a medical episode, and hitting her head.
"Shari was getting back into running as it had been a while as she had her nose reconstructed again, so with that healing up she must have decided Tuesday was the day to start back up and go for a run," Mr Fietje wrote on Facebook.
"(The couple's other son) Axell was in the house asleep and Astin and Shari in the shed.
"From what I understand from Astin is that, 'mum was on the treadmill and got off and turned it off, then she fell over and hit her head and went to sleep, so I went to sleep with her'. It was so hard to hear this from Astin."
Mr Fietje said he was not sure of the exact cause of his wife's death.
"I cannot comprehend why and am in complete disbelief this happened," he wrote.
"Shari was such a great mum, she absolutely loved our boys Astin and Axell, and loved where we lived, our first home together.
"It's our slice of paradise."
Mr Fietje posted the message alongside a photo of his wife after she had recently completed a 10km run.
"I was proud of her then, but I really wish I expressed how proud I feel now of her back then," he said.
"This marathon was her first of many to come, and with tears I write was her last."
Mr Fietje paid tribute to his wife, saying she loved her vegie garden and orchard.
"She got stuck in with the lawns on the property or just loved having a coffee outside and watching the boys," he said.
"We would always talk about our plans for the house and what we would do next. Something I am going to find harder then ever now, but I feel in time I must carry on our dream.
"Life has thrown a major curve ball, and I know it's going to be a long uphill climb now.
"I am so sorry Shari, that you won't get to see Astin and Axell grow and develop, or share any more laughs and adventures with us. The thought of this I cannot comprehend, it's just not fair."
Mr Fietje wrote he promised he was going to try his best for their children.
"You are still in all of our hearts," he said.
"The boys are doing really well, but I know as their understanding develops, there will be a lot of questions and it's going to be so tough seeing them grow up without a mum.
"Treasure every moment you have with your wives, as you just don't know when it can all be taken away."