Maureen Tudor was an ordinary mother swept into madness when her daughter Rachel became a heroin addict. Her family slowly fell apart as a result, hastened when her daughter died from a heroin overdose at the age of 18. Broken by the loss of her daughter, Maureen succumbed to madness, focusing her rage on the man she thought responsible. Paddy Maguire was the drug dealer who indirectly supplied her daughter and Maureen saw him as her target for revenge. The actions she took in seeking revenge make her the main antagonist of series 6.