Jess is convinced that colleague Melanie has set her up in Friday's Fair City on RTÉ One and the RTÉ Player.
After a truce, things go downhill again when boss Joan finds Jess's toddler son Taylor in the office - and Jess thinks Melanie told Joan.
"You spiteful, vengeful old hag!" says Jess.
"You better watch how you speak to me," warns Melanie.
"You've just made a massive mistake," says Jess.
Watch 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.
