Seán comes to Nikki's defence and incurs the wrath of Jacinta in Friday's Fair City on RTÉ One and the RTÉ Player.
"She made a mistake, Jacinta," says Séan. "She owned up to it."
"And you're no better - covering up for her!" snaps Jacinta.
"That's what friends do," replies Seán. "If you had any, you'd understand."
Fans can find out what happens next on Friday on RTÉ One and the RTÉ Player at 7:30pm.
Fair City airs on RTÉ One and the RTÉ Player on Sundays, Tuesdays, Thursdays, and Fridays.
