Two of her adult children lived in Wanganui and she was trying to reconnect with them, police said.
In late March 2014, Carston's children were expecting to see her, but were unable to get hold of her for two days, the police summary of facts said.
Carston showed up at her daughter's house, upset, saying her ex-partner had found her, kidnapped, drugged, and raped her, and she had only just then been able to escape.
The daughter called police and Carston made the same statement, saying the man forced her to take drugs. She then underwent a forensic medical examination. On March 30 the ex-partner was arrested and charged with assault with intent to injure and threatening behaviour.
After admitting her lies, Carston said she and the man had argued about the relationship and he did assault her by strangling her. Earlier this year, Carston pleaded guilty in the Hawera District Court to making a false claim, and faced a maximum of three years in prison. She appeared for sentencing before Judge Max Courtney on June 3.