Fergal hangs a crude photoshopped poster of Mairéad and Dean kissing in Tuesday's Fair City on RTÉ One and the RTÉ Player.
As the fallout from Mairéad and Dean's affair begins in Carrigstown, Fergal points to the picture in the Community Centre and says to Mairéad: "You're really giving it full tongue."
With that, Dean goes to hit Fergal as Leo and Tommy try to restrain him.
Fans can watch what happens next on Tuesday on RTÉ One and the RTÉ Player at 8:00pm.
