She said Hunter heard motorbikes and thought Mr Guy was coming home.
She went to the window and saw Mr Guy's silver ute and a large stock truck.
Then she saw police cars and thought farm worker Matthew Ireland may have been run over.
``I didn't think it was Scott,'' she said.
She and Hunter put on jackets and went outside but a police officer came running up to her.
``He told us to go back inside.''
She went into the bedroom and ``just sat there'' on the bed.
Ms Guy said she was very upset and called a friend to look after Hunter.
She earlier spoke of the last day she spent with her husband.
Mr Guy had tended to the sheep that day before finishing work on a cow shed on the property where their chocolate labrador and seven of its puppies were kept.
Mr Guy showed his father Bryan the shed that day because he was very excited about the work he had done.
Later that afternoon, she and Mr Guy went shopping at The Warehouse with son Hunter and bought a train set for him.
They returned home for dinner when it was dark.
She put Hunter to bed and went to bed herself because she was ``knackered''.
Mr Guy took a call from a friend and she called out to him to come to bed.
``I was yelling out because I was so tired ... I just wanted to go to sleep.''
Mr Guy got off the phone, showered and came to bed.
Ms Guy, who was heavily pregnant with second child Drover, said she had a deep night's sleep that night.
``I'm normally a light sleeper but when I'm pregnant I'm a deep sleeper.''
Ms Guy said her husband usually awoke to the alarm on his phone but she did not hear it and did not know what time it was set for.
His morning routine was to put on his clothes, which he picked out the night before, before using the bathroom further down the house so he would not wake her and Hunter.
``Then he'd have his coffee and normally check his mail, use the computer.''
She was not woken by Mr Guy's ute that morning, and said she hardly ever was.
Both Anna and Kylee - as well as Mr Guy's father Bryan, mother Joanne, and sister Nikki - are to give evidence on aspects of the Crown case more than once during the trial before Justice Simon France and a jury of 11.
The wife of murder accused Ewen Macdonald said she did not believe her brother Scott Guy was dead when she was told the news.
Ms Macdonald told the High Court at Wellington today she was told of her brother's death by her sister, Nikki Guy, who said: ``It's Scott, it's Scott, he's been shot dead.''
She said she was in disbelief at the news.
``I didn't believe her and I was saying, `Are you sure, what's going on?'''
Macdonald later came running into the house.
``He looked really pale and was shaking and had been crying.''
The family gathered at the house but Ms Macdonald still did not believe the news.
``I just thought someone must have got this wrong.''
