Dick said she could face prosecution if evidence suggests she is guilty of criminality.
European countries say they are working on how to deal with their citizens who want to come home, including investigating and prosecuting those guilty of crimes. "Not just the fighting videos, but yeah the fighting videos as well, I guess".
Begum said she was "sorry" to all the families who had lost loved ones in Isis-inspired attacks in the United Kingdom and across Europe, adding: "That wasn't fair on them".
"Who's there to guide her, talk to her, why is she so lost within her soul?"
Under global law the United Kingdom cannot actually leave people stateless but he says she could be "questioned, investigated and potentially prosecuted".
"I'm a 19-year-old girl with a new born baby".
In an interview with the BBC's Middle East correspondent, Quentin Sommerville, Ms Begum said she is ready to face prison if it means returning from a Syrian refugee camp to the United Kingdom with her baby boy, who was born on Saturday.
Begum was one of a group of schoolgirls from London's Bethnal Green neighbourhood who went to Syria to marry IS fighters in 2015 at a time when the group's online recruitment program lured many impressionable young people to its self-proclaimed caliphate.More news: Karl Lagerfeld, Chanel fashion designer, dead at 85
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'I was really young and ignorant and I was 19 when I made a decision to leave'.
But to kill people like women and children, just like the women and children in Baghuz [Isis's last stronghold] who are being killed right now unjustly by the bombings - it's a two-way thing, really, because women and children are being killed back in Islamic State right now.
"I think a lot of people should have sympathy towards me for everything I've been through", she said in an overnight interview.
He told BBC Breakfast: "The family have gone out of their way from day one to try to get her away from the IS narrative and the context which she finds herself in".
"I do regret it because when I went I thought I was going to make a family and I didn't realise what the things they were doing that they weren't showing in their propaganda videos, and I actually do regret it, I do feel bad for anyone who was affected by the actions of ISIS". "I don't understand what's going on there", he added.
She added she had been "OK with" beheadings carried out by Islamic State adherents because she had heard it was allowed under Islamic law. Among the general public too there has been a chorus of calls for the lack of mercy shown to Isis victims to be extended to Begum and her newborn son. "Their [Isis's] justification [for Manchester] was that it was retaliation, so I thought, 'OK, that is a fair justification'".
Ms Begum's lawyer, Tasnime Akunjee, said the Government had a "moral duty" to bring Ms Begum back to the UK.