"She was immediately rushed to hospital, however, was certified dead on arrival," said Hlathi.
The girlfriend also fell ill shortly thereafter. She was treated and later discharged. Police investigations revealed that the meat might have been poisoned.
The suspect has been charged in connection with the death of the seven-year-old child as well as the attempted murder of his girlfriend and another relative who had eaten the chicken. He will return to court on January 18 for a formal bail application.
A 24-year-old Witbank woman has been sent for medical observation after she was accused of killing her four children.
Zinhle Maditla from the Klarinet area is alleged to have poisoned her children, aged 11 months and eight, on December 27. The children's decomposed bodies were found three days later, wrapped in blankets in their home.
"In December last year, 2018, another woman is reported to have poisoned three of her children in Moroka, Gauteng, and ran to hide at Vosman, Witbank," said Hlathi.
"Two of the children died while one survived," Hlathi added.
The woman was arrested and taken back to Gauteng, where she is set to face charges.