The defiant 18-year-old daughter of Westminster killer Khalid Masood fought against his new ideals after he suddenly converted to Islam.
Teegan Harvey remained at the family home after he abandoned her mother more than a decade ago.
She went on to become a popular and successful pupil at a £15,000-a-year private school before joining a grammar for sixth form.
Photographs of her posted online show a confident and fashionable teenager who is a far cry from what might be expected of the daughter of an Islamist fanatic.
One family friend of Teegan said Masood now appeared to be almost entirely absent from her life. ‘They never mentioned the father at all, and until all this I knew absolutely nothing about him,’ he said.
By contrast, Teegan’s older sister Andi followed in her father’s footsteps in converting to Islam and is now believed to be in Birmingham, the city he most recently called home.
Neighbours said the 24-year-old wears traditional Islamic dress and is always seen with her face covered in public. The girls’ radically different paths are believed to have caused considerable friction within the family.
One acquaintance also said he believed Andi had recently given birth, making 52-year-old Masood – who was shot dead at the scene of the attack last Wednesday – and his former partner grandparents.
Last night, Teegan remained with her mother Jane Harvey, who has a new partner, at their £300,000 semi-detached home in Tunbridge Wells, Kent.
Miss Harvey, 48, a successful businesswoman known as Jay, first settled in the picturesque village of Northiam, near Rye, East Sussex, after meeting Masood in the early 1990s. Then known as Adrian Elms, he worked alongside her at Aaron Chemicals in nearby Bodiam.
The couple first had Andi – who has Jay as her middle name – in 1992 before Teegan was born six years later.
Both girls attended their local primary, and Teegan went on to the £5,000-a-term Claremont School, in St Leonards-on-Sea. But Masood fell in with a bad crowd and began getting into fights, leading to his arrest and eventually two jail sentences.
When Andi was eight, Masood was jailed after slashing a man’s face with a knife in a violent confrontation outside a local pub.
He blamed racism for triggering the appalling violence, which left his victim Piers Mott needing 20 stitches to a gaping wound in his cheek. A neighbour said: ‘In prison he was radicalised by other inmates and converted to Islam. He became a real extremist.
‘When he got out of prison he decided he wanted to live an Islamic life and didn’t want anything to do with his past life at all.
‘He left Jay and the girls and went to live in some dump in Eastbourne and I think he met someone else. He never came back after that and Jay was left to bring up the two girls on her own.’
According to residents, the estranged couple stayed in touch and the two girls did see their father intermittently.
But tragedy struck the family in 2008 when Andi, then 16, was run over while crossing the road to catch her school bus.
The neighbour added: ‘It’s such a dangerous road. She was knocked down and she almost died. She was severely injured and her parents had to keep a bedside vigil.
‘She was in hospital for ages and was then left disabled. She had to relearn everything and was left in a wheelchair.’
In 2004, Masood – still using the name Adrian Elms – married Farzana Malik, then a 25-year-old marketing assistant, at Medway Register Office in Rochester, Kent. A few years ago, Andi also converted to Islam and went to live with her father in Luton, then later Birmingham.
Metropolitan policeman Keith Palmer (left), mother-of-two Aysha Frade (centre) and US tourist Kurt Cochran (right) were victims of the attack on Westminster
The neighbour said: ‘No one could really believe it because she was never religious before. She adopted all the Muslim customs including wearing a headscarf.’
Meanwhile, Teegan remained with her mother, enjoying an affluent middle-class lifestyle. Her wide circle of friends included the children of farmers and well-heeled commuters, mostly living in large detached houses in the Kent and Sussex countryside. The father of one of her former school friends said: ‘She’s a lovely girl and her mother is lovely as well.
‘As far as I’m aware they had nothing to do with her father.’
According to her birth certificate, Andi was born in April 1992 at the Pembury Hospital in Erith, Kent. At that time, Masood gave his occupation as a ‘sales rep’.
Miss Harvey still owns their former cottage in Northiam, which is currently rented out.
One villager claimed the property is linked to a long-running dispute over the building of some garages and cannot be sold.
The movements of Khalid Masood
1964 - Born Adrian Elms on Christmas Day in Dartford, Kent.
1966 - His single mother, Janet Elms, later marries in Crawley, West Sussex and they later move to Tunbridge Wells, Kent and Rye, East Sussex.
1983 - In November that year, he picks up his first conviction, for criminal damage.
2000 - Jailed for two years for grievous bodily harm. When he is released, he moves to the East Sussex village of Northiam.
2003 - Aged 39 and running an aerial installation firm, he is jailed for six months for possession of a knife.
2004 - After being freed from prison, he marries Muslim Farzana Malik in Medway, Kent. It is unclear for how long they were married but they are now believed to be divorced.
2005 - Believed to have taught in Yanbu, Saudi Arabia.
2006 - Said to have lived in Crawley and to received visits from police.
2008-2009 - According to his CV, he returned to teach in Jeddah, Saudi Arabia.
2009-2012 - He is believed to have lived in Luton having changed his name to Khalid Masood. His CV claims he worked at a language school.
2012 - Set up his own teaching firm in Birmingham.