It's the eve of his wedding, and a panicked Mack treads carefully in an effort to find out if John Joe remembers what he drunkenly confessed at his stag party! Little does he know that Noreen, Dee's mother knows his secret. Jason plans to ask Katy to legally become Cuán's mother. But the timing couldn't be worse, as Katy decides that she cannot live with her guilt any longer. In the hopes of securing a loan from Berni, Bobbi Lee hatches a plan to sabotage Máire and Pádraig's bid for a business opportunity so that Berni will be the only one left in the running.