Fiona Larkin is Chibs' estranged wife who was introduced in Season 2. Fiona first appeared at Chibs' bedside when he was hospitalized after nearly being killed by a car bomb. Fiona's presence instantly made it clear to the Sons that IRA member Jimmy O'Phelan was in Charming and that Chibs' life was in danger. Fiona is described by Agent Stahl to be 3rd generation IRA. It was revealed that years before, Jimmy O'Phelan ran Chibs out of the IRA back in Belfast and subsequently married Fiona and adopted Chibs' daughter. The reason for Chibs' exile from the IRA is never revealed.