Gwen and Fergal are stunned when they receive a visitor in Thursday's Fair City on RTÉ One and the RTÉ Player.
When Melanie arrives, she tells the housemates: "I just wanted to let you both know that I have been instructed by Joan to move into the spare room. I'll be moving in tomorrow."
Fans can find out what happens next on Thursday on RTÉ One and the RTÉ Player at 8:30pm.
Fair City airs on RTÉ One and the RTÉ Player on Sundays, Tuesdays, Thursdays, and Fridays.