Sometime during 2017, the defendant's husband moved back home, but on January 24 this year he left again, leaving a note for Mason.
About 10.35pm that day the victim was at her Tauranga home.
Mason, who had been hiding on the property, attacked the victim as she stepped outside her back door to take some rubbish to the rear of her property.
Mason then left the property and went to her brother's address, where she was found by police and arrested.
Her lawyer, Rachael Adams, told Judge Thomas Ingram that despite the court having ordered a mental health report, she was satisfied her client was fit to plead to the charge.
Judge Ingram remanded Mason in custody pending sentencing on March 21.
The judge called for a home detention report but made no promises to Mason that would be the sentencing outcome. He also called for a restorative justice meeting report.