The Maguire family's drug dealing business comes back to haunt them when Mimi's beloved Paddy is abducted and forcibly addicted to heroin by the bereaved mother of one of their deceased customers. To make matters worse, she is arrested for an assault that her son Jamie carried out. However, she freely states that she wants to take the blame for the attack, claiming "A mam's gotta do what a mam's gotta do". This is because she does not want to see her ex-con son go to jail again. At the end of series 6, her beloved daughter Mandy is killed by the woman who got Paddy addicted to heroin. The strain of this loss causes Paddy and Mimi to split up.