For eight months of 2001, she was in a relationship with Harry Nuttall, a racing driver she had known before leaving for California. Troubles set in in October 2001, when she became pregnant, and their son Jack was born in June 2002. According to Cunningham's own account, Nuttall at first accepted responsibility for the child, but over the following months, in her words, "slowly, he disappeared from my life". At Christmas 2001, Nuttall met another woman, and they were married in July 2002. Angry, Cunningham took her story to the press, and a long feature appeared in the Evening Standard the day before Nuttall's wedding, revealing the birth of his son two weeks before. Cunningham commented at the time that Nuttall was "...just about the poorest man I ever dated. He didn't really register on my Richter scale". Nuttall continued to dispute his role in the birth of his son until forced to take a paternity test. However, within months he had persuaded the Child Support Agency (CSA) that he could afford only £5.40 a week in child maintenance. Cunningham took a one-year paralegal course at Westminster College, and alongside her own dispute over child support she began a long-running campaign to reform the child support system. She formed a group called Babies for Justice (which later merged with Mothers for Justice), and organized a protest march to Downing Street. In 2004, she gave evidence to the House of Commons Work and Pensions Committee for its report on the performance of the Child Support Agency. A court hearing in 2005 confirmed the level of support from Nuttall as £5.40 a week, and on the way out of court Cunningham kneed Nuttall in the groin. She was charged with assault and appeared in a magistrate's court in November 2006, pleading "guilty as hell". After explaining the background to the case she received a conditional discharge. Nuttall's father, Sir Nicholas, began to take an interest in his grandson, paying the airfares for a visit to him in the Bahamas in 2005, and in July 2007, a few days before his death, arranged a final meeting. After that, Cunningham asked the CSA for a child support review, but Nuttall then claimed to have no income at all, and the payments of £5.40 ended. A claim in the family division of the High Court failed to award any child support, after the judge, Mr Justice Singer, had asked "Do you seriously expect Mr Nuttall to sell his shooting rifles for child maintenance?"