Zoe's last words to her mum.
The next day, her badly burned remains were found in woodland on the outskirts of Wishaw, Lanarkshire.
Yesterday, the High Court in Edinburgh was told of a family row on the day student Zoe, 17, is said to have died.
Robert Bayne, 21, was said to have been seeing both her and her younger sister, Laura Anne, in the days before he allegedly murdered Zoe and torched her body.
And Zoe's mum Marieann Nelson, 40, told the court her daughters came to blows at their home in Newmains on May 22 last year.
Laura Anne got "a bit upset" when Bayne and Zoe left the house together, she said.
She added: "The two of them ended up having a fight at the end of the driveway.
"I said, 'Go away, you cow, and don't come back'.
"She said she wouldn't come back."
Zoe's charred remains were found at a spot known locally as Monkey Hill the next day.
Bayne denies murder and trying to defeat the ends of justice. The trial continues.
VICTIM: Zoe Nelson