The latest horrific claims were made by Ms Dakhil in a recent interview with Egyptian channel Extra News. It was translated by the Middle East Media Research Institute.
Talking about some Yazidis she had rescued, she said: “One of the women whom we managed to retrieve from Isis said that she was held in a cellar for three days without food or water.
“Afterwards, they brought her a plate of rice and meat. She ate the food because she was very hungry.
“When she was finished they said to her: ‘We cooked your one-year-old son that we took from you, and this is what you just ate’.”
The remark reduced her interviewer to tears.
Ms Dakhil also told of the fate of another Yazidi woman. She said: “One of the girls said that they took six of her sisters.
“Her younger sister, a ten-year-old girl, was raped to death in front of her father and sisters. She was ten-years-old.”
Nearly 10,000 Yazidis are believed to have been killed or captured by Isis during the extremists’ offensive in August 2014 across Iraq.
Isis reserve particular contempt for the minority group. Many women have been kept as sex slaves. Others have been discovered in mass graves.
Iraq crisis: Yazidi nightmare on Mount Sinjar
In May, journal PLOS Medicine estimated that of the 9,900 Yazidis captured by Isis two years ago, 3,100 were killed, some by brutal methods such as decapitation.
Many of those who were captured remain missing.
It was during this period Ms Dakhil made an impassioned speech to the Iraqi Parliament, begging the world to come to the aid of her people at Mount Sinjar, where they were besieged.