Using the false name Um Asthma for fear of violent retribution from the brutal regime and its psychotic followers, she outlined the savage treatment of women in Syria.
Speaking to Germany’s Bild, the 23-year-old said: "The caliphate is not what you think it is.
"Women are whipped, sold and stoned. Corpses are on display publicly for weeks.”
She also spoke of her life before ISIS swept across the region, admitting she wore “normal clothes, had Christian friends, listened to music and went dancing.”
But after the terror group raised its black flag over her home city of Raqqa, she joined the militant’s female wing al-Khansa - simply to survive.
Her role was to help women from Germany, France and the UK to travel over the border from neighbouring Turkey
Once in Syria, the woman receive a four-week training course in the use of firearms and also study the Koran.
Many western women who join ISIS have suffered dreadfully at the hands of the brutal regime.
One is Tareena Shakil, 25, who reportedly told her family she was going on holiday to Spain before taking her then 14-month-old boy Zaheem to the Islamic State stronghold of Raqqa in October last year.
But the TOWIE fan is believed to have realised her terrible mistake after militants tried to force her to marry and fled for her life across the border into Tur
Tareena, from Burton-on-Trent, hailed a cab, ran across the desert and even dodged bullets before scaling a barbed wire fence during her daring escape, the Sun reported.
She reportedly begged for her life after being spotted by a Turkish sniper, screaming "I'm desperate" in Arabic.
The Sun quoted a family friend as saying: "It's a miracle she escaped alive. Tareena realised when she got to Syria she had been a victim of false propaganda from IS.
"She hoped to escape to an idyllic lifestyle. Instead she found a living hell."
She was arrested by anti-terror police as she landed at Heathrow airport in February.