Carol turns the screw on pathological liar Louis in Sunday's Fair City on RTÉ One.
Unbeknown to Louis, Carol has figured out that he has lied about having a life-threatening heart condition - and she is determined to see him squirm.
Playing along with the deception, she backs Louis into a corner on Sunday night.
Carol tells him: "You can't hide the truth from Jack or anyone else. We'll tell him when he comes in from school."
As Louis looks away sheepishly, Carol adds: "Unless, eh, you have a reason not to..."
Fans can find out what happens next on Sunday on RTÉ One at 8:30pm.
Fair City airs on RTÉ One on Sundays, Tuesdays and Thursdays.