Lisa Smith has been arrested on suspicion of terrorist offences following her arrival back in Ireland this morning.
Ireland agreed to repatriate Lisa Smith, 38, and her two-year-old daughter after Ankara began deporting foreign citizens linked to Islamic State earlier this month.
Plans have additionally been made for the care of her two-year-old daughter, who was born in Syria, however is an Irish citizen.
The ISIS bride was not in custody for the four-and-a-half-hour flight but Gardai, the Irish police force, were waiting at Dublin airport for the plane's arrival.
"I think Lisa will actually be quite surprised by this turnaround, because when I interviewed her twice in Syria Lisa had no idea that there was any chance she could get arrested for this".
Ms Smith, from Co Louth, said the father of her child was a suspected member of IS who died a year ago.
The channel's London reporter Dimitri O'Donnell said he saw Smith moved to the back of the plane before it had even stopped on the taxiway, after which she was taken off separately by the authorities.
Wearing a niqab and carrying her young daughter in her arms, Smith added that she wanted to return to Ireland.
Meanwhile, Smith is "not living among" the Irish people and that she is "in a Garda station being questioned", Coveney said.
Turkish Airlines flight 1975 from Istanbul landed shortly after 10am this morning.
She has denied being involved in violence.
He said: "This is a sensitive case and I want to reassure people that all relevant State agencies are closely involved".
She has said the father of her child was a suspected member of IS who died previous year.
The taoiseach (Irish prime minister) had beforehand stated she would "certainly" be investigated if she returned to Ireland. It is believed she is now being detained close to Syria's border with Turkey.
In media interviews before her repatriation she said a spiritual yearning led her to a mosque in Dundalk and subsequent radicalisation by a USA extremist she met on Facebook.