Scores of civilians have since fled areas controlled by the group in the extremists' self-styled capital.
Dozens of runaway brides are reportedly now being held in a jail with their children at a refugee camp 30 miles north of the ISIS 'capital' Raqqa, in Syria.
They have since described their bizarre lives as partners of ISIS fanatics.
ISIS brides have revealed the reality of being a wife in the caliphate, describing jihadi speed-dating, women fighting in dormitories and religious fanatics who are 'only interested in sex'.
Ex-wives and widows of extremists told how they paid smugglers to help them flee from once the terror group started to lose territory in Iraq and Syria.
They had paid large amounts to travel to the ISIS-held city in the hope of marrying men who were 'pure Muslims' and taking advantage of free healthcare and education.