An American woman whose husband died fighting for ISIS has spoken about life in the 'caliphate capital' in Syria for the first time.

Sam El Hassani claims her husband Moussa tricked her into crossing the Syrian border during a holiday to Turkey in 2015, where he joined ISIS as a jihadist fighter.

She reveals she found herself living with their children in Raqqa, along with two Yazidi girls her husband kept as slaves in their home, which he 'repeatedly raped'.

Speaking out: Sam El Hassani, from Indiana, U.S., spent two years in ISIS's then-capital Raqqa in Syria with her ISIS fighter husband

In a documentary for PBS Frontline and BBC Panorama, Mrs El Hassani details how she went from happily married in Indiana to a widow with four children in a Kurdish prison in Syria.

The couple had been married for five years and were living 'a great life' in Indiana with their two children.

But - she claims - she did not see that her husband, a Moroccan national, was becoming radicalized, and in 2015 he lured her and the children into Syria and to ISIS's now-defeated 'capital'.

'We ended up in Raqqa,' she says in an interview from the upcoming documentary.

'The first thing I say to him is, "You’re crazy and I’m leaving," and he said, with a big smile on his face, "Go ahead. You can try, but you won’t make it.”.'

Childhood destroyed: The couple's oldest child Matthew is seen in the U.S. before the move left, and right, as a puppet in an ISIS propaganda video in Raqqa last summer

Happier times: The couple are seen on their wedding day in Indiana in 2011

When asked why she did not take her children and run, she says; 'You have to understand, I was afraid for our lives.'

During their time in Raqqa, Mrs El Hassani had two more children, and was forced to watch her oldest son used in an ISIS propaganda video that shocked the world.

Last July, ten-year-old Matthew could be seen calling U.S. President Donald Trump 'a puppet of the Jews' in a video which saw him threaten terrorist attacks on the West.

'Allah has promised us victory and promised you defeat,' Matthew is seen saying while standing on the rubble of bombed buildings in Raqqa.

'The battle is not going to end in Raqqa or Mosul, its going in your lands. By the will of Allah, we will have victory, so get ready for the fighting has just begun.'

Changed man: Mrs El Hassani claims her husband Moussa, pictured in the U.S. before joining ISIS, became radicalised and tricked her into taking their children to ISIS in Syria

Shocking: Matthew's face was seen around the world in the 2017 propaganda video where he called Trump ' a puppet of the Jews' and threatened terror attacks on the U.S.

Mrs El Hassani says she understands how the video can make it look like her son poses a danger to the U.S., but insists that this is only because this was ISIS's goal.

'That’s the way it’s meant to look. It’s propaganda. But how can you convince somebody that sees something like that? I don’t know.'

Moussa died fighting for ISIS last year, and Sam and their now four children were captured by U.S.-backed Kurdish forces when Raqqa fell.

The interviews for the Frontline and BBC film were carried out under supervision from her Kurdish guards, but despite being imprisoned, she told the documentary makers she had no desire to go back to the U.S.

Her family are trying to help them return to the U.S., but in the documentary, even Mrs El Hassani's sister Lori acknowledges that she is likely to be sent to prison.