She is first introduced when Jimmy visits her and his brother. Soon Debbie discovers she sent Jimmy/Steve a suggestive text. After Debbie goes to Fiona with this, Fiona is jealous but Jimmy assures her that he is definitely not sleeping with Candace.
Debbie takes it upon herself to investigate. She discovers Candace is actually Jimmy's mother who lives on the Northside and has absolutely no idea what Jimmy is actually up to.
She divorces Ned once she discovers he is bisexual. She is last seen in season 3, when Ian and Mickey break into her house at the request of Ned. Candace discovers Mickey trying to make off with a clock and fires a shotgun at him multiple times, hitting him in the rear.