Karen Nettleton is a 54-year-old grandmother.
She is also the mother-in-law of Australia’s most notorious Islamist militant.
Her only child, daughter Tara, married notorious terrorist Khaled Sharrouf – an Australian recruited by ISIS, whose fate is unknown following a recent drone strike on a convoy in Syria. She was 15 when she converted to Islam, married Sharrouf and became pregnant. As of early last year, the now-31-year-old lives in Islamic State-controlled Syria with her five children, who are aged between four and 14.
One of Tara’s sons, 10-year-old Abdullah, was pictured holding the severed head of a Syrian soldier last year.
Ms Nettleton says the image – which was tweeted by Sharrouf and splashed across the front page of a newspaper – was the worst thing she has ever seen.