 Reilly was first elected to parliament at the 2001 state election and was subsequently re-elected at the 2004 state election and 2006 state election.Seeking a fourth term at the 2009 state election, she was defeated by Liberal National candidate Ros Bates.Since her defeat in 2009, Reilly is employed by the Government owned and controlled Water Retailer Allconnex as a media and public relations advisor.