Shamima Begum, whose fate has stirred controversy ever since she and two friends fled London to join the terror network in 2015 aged just 15, was reportedly told her British citizenship would be revoked via a letter from the Home Office on Tuesday.
However Begum, who married an ISIS fighter, she was only a housewife during her time in Syria: "I never did anything risky, I never made propaganda, I never encouraged people to come to Syria", she said.
Home Secretary Sajid Javid, who oversees immigration, said Monday he would not hesitate to prevent the return of Britons who travelled overseas to join Isis.
In a statement posted on Twitter, he said: "Family are very disappointed with the Home Office's intention to have an order made depriving Shamima of her citizenship".
Tasnime Akunjee, a lawyer for Ms Begum's family, said he did not believe Mr Javid had "the legal grounds or tools to stop her coming back". "It took me a long time to learn but it was liberating and enlightening and I want her to learn that for her and her child", she added.
"In a way yes, but I don't regret it because it's changed me as a person, it's made me stronger, tougher. This is the hardest of news to bear", the family said.
When Ms Begum left the United Kingdom, the then chief of counter-terror policing Sir Mark Rowley suggested that she might be treated as a victim of grooming.
'She said she used to be a social worker and children of extremists, they get taken away, to the orphanage.'
Her third child was born in the refugee camp over the weekend.
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Ms Joya, who has renounced Islam and now helps other ex-IS wives and jihadists, told Sky News: "I feel that I probably would have made the same mistake as she did if I was 15 years old and in her situation".
Shamima Begum, indubitably one of three teenage women to hover east London for a fresh life with the Islamic Assert neighborhood, says she has given birth to barely one boy. She's said herself that the only reason she's wanting to leave there was because it got too unsafe.
His comments came after a British teenager who joined ISIS in Syria said in an interview that she wanted to come home.
The fresh focus on the case came as Britain's government appeared divided on how to respond to demands from US President Donald Trump that European nations take back hundreds of Islamic State group fighters captured in Syria.
He noted, however, that they would face the possibility of prosecution and a jail sentence for supporting a terrorist group.
She told the Times that she feared she may never see or be allowed to live with her husband again, adding she loved 26-year-old Yago Riedijk "very much".
The Home Secretary's power to deprive someone of their British citizenship is covered by Section 40 British Nationality Act 1981.
'My message is clear, if you have supported terrorist organisations overseas I will not hesitate to prevent your return, ' he told The Times.