David Blunkett's former lover Kimberly Quinn hails from Los Angeles but has been working in publishing in the UK since the 1980s.
Mrs Quinn was married less than three months when the affair began
Her three-year affair with the former home secretary ended in acrimony, including allegations he abused his position to help her former nanny acquire two different visas.
Mrs Quinn began a relationship with the minister, 57, less than three months into her second marriage, to millionaire Vogue publisher Stephen Quinn.
She is expecting her second child in February and is signed off sick from her position as publisher of The Spectator magazine.
Mrs Quinn, 43, who until recently used her former surname Fortier, has a two-year-old son.
The paternity of that child and her unborn child have both been thrown into doubt by the controversy sparked by the break-up with Mr Blunkett.
The daughter of wealthy parents, Mrs Quinn grew up in the United States, along with her sister Jennifer.
Her father Marvin Solomon made his money from radiation detection equipment, while her mother Lugene Sanders was a television actress.
She studied politics at Vassar College in New York, then took a degree at Oxford University.
Her career began as secretary to the founding editor of Cosmopolitan, before she moved to Woman's Day in 1983, then became editor of a trade magazine in the USA.
She married her first husband, American investment banker Michael Fortier, in 1987. They subsequently moved to the UK.
Mrs Quinn joined Conde Nast magazine publishers in the mid-1990s, when her now husband Stephen was publishing director for the company's GQ title.
She took up the Spectator job in 1996.
Dinner party meeting
Her first marriage ended in divorce in 2000, and she married Stephen Quinn in the summer of 2001.
They were reportedly known as a "power couple" in the publishing world, having both risen to the top of the industry.
Mr Blunkett and Mrs Quinn first met at a dinner party in August 2001.
They are said to have shared the same frank sense of humour.
During their three-year affair she regularly visited the Home Secretary's official London home and his cottage in the Peak District.
Claims and counter-claims have turned the relationship sour
Along with Mrs Quinn's son the pair also shared a holiday on the Greek island of Corfu.
She ended the relationship this summer, deciding to return to her husband, who has said he forgives her.
Mr Quinn, 60, who has three children from a previous marriage, had had a vasectomy reversed so the couple - who live in Mayfair in London - could try for children.
Born in County Kilkenny to a traditional Irish middle class family, Mr Quinn first came to Britain in the late 1960s to seek work.
One of his first jobs in publishing was selling adverts for the National Magazine Company, where he met his first wife Jane.
He gained a reputation for spotting trends and helped lift sales on magazines such as Business and Harpers & Queen. In the late 1980s he launched GQ, one of the first lifestyle magazines aimed solely at men.