The 29-year-old reportedly killed the terrified boy with four blows to the head before butchering his body in the bathroom.
A mother has killed her five-year-old son with a machete, cooked and ate part of his head.
The incident happened in Egypt.
She was arrested after the boy's horrified uncle found body parts in buckets at the home in Abu Shalabi, Egypt, local Egyptian media reported.
Officers were shocked when the suspect, Hanaa, confessed that she had eaten part of her son's head because she "wanted him to stay with her forever".
The 29-year-old reportedly killed the terrified boy with four blows to the head before butchering his body in the bathroom.
Then, she allegedly cooked his head and other parts of his flesh in boiling water on the stove before eating them.
After her arrest, she claimed to the police in Faqous, Ash Sharqiyah Governorate, that she "suffers from a mental illness" and had not intended to kill her son.
The woman and the victim, Youssef, had been living alone after her separation from her husband, who insists that she knew exactly what she was doing.
The ex-husband, known only as H.A., told local media: "When I arrived, the police prevented me from seeing my son because of the horrific scene."
He explained: "We separated from each other four years ago because she had land from her father and asked me to leave the house and my family and go with her to live on the land.
"But I refused, and the relationship ended entirely by her will, and I tried to reconcile with her after the divorce, but she refused and stuck to her opinion."
H.A. added: "My son was the one who kept me connected to her, and I used to see him regularly and bring him clothes and things he needed.
"But recently, she was trying to keep him away from me and plant hatred towards me in his heart, so he wouldn't come to me.
"I was trying to communicate with her family to see my son and make sure he was okay."
According to his lawyer, Samir Mohamed Saleh, the suspect was stone-faced when she told her questioners: "I wanted to free him and myself.
"I wanted to take revenge against his father and be free. His father keeps coming and trying to take him away all the time."
The Public Prosecution Office said in a statement that the suspect had been detained and that she may be of sound mind but it will be determined in a mental health assessment.