Sally Jones, dubbed 'Mrs Terror' by the British media, has been using social media to make a series of threats against the West using a variety of aliases such as Sakinah Hussain and Umm Hussain al-Britani.
Now Jones, whose husband was killed in an American drone strike, has suggested she might be planning a suicide mission after praising Hawa Barayev who blew herself up in Chechnya in 2000, a report in the Daily Express said.
'I know what I’m doing. Paradise has a price and I hope this will be the price for Paradise,' she said in a social media post.
She said Barayev was a martyr and ended the post with a heart.
Jones is currently being hunted by anti-terrorism experts in America after she was deemed a major threat to security.
She is now on a list of the world's 'most-wanted' terrorists which means she could also be targeted by a drone strike.
Jones, who once played guitar in the all-girl group, swapped her home town of Chatham for Raqqa, in Syria, in 2013 after striking up an online romance with Junaid Hussain, a computer hacker from Birmingham.
Relocating to Syria with her 10-year-old son, Jojo, she left her eldest son, Jonathan, behind in Britain, and he himself has now had a child, making Jones a grandmother, the newspaper reported.
If she goes ahead with a suicide mission, it will be the first time IS has used a woman as a suicide bomber in the West.
Jones is not the only British woman being hunted for terror attacks.
Samantha Lewthwaite, dubbed the 'White Widow', is the 31-year-old wife of July 7 bomber Germaine Lindsay, and is wanted by Kenyan authorities for her involvement in terrorist plots across East Africa.