Oisin becomes suspicious when he finds Orla snooping through Niamh's belongings, take a sneak peek at the drama coming up on Wednesday night's Fair City here.
In the next episode from Carrigstown, Niamh is intent on getting hold of Ruth's birth certificate and ropes in Orla to help her.
Wayne heads off to check in Oisin's room while Orla stars rummaging in some drawers.
It's not long before Oisin materialises and spots Orla.
"What's going on?" Oisin demands to know.
Orla springs up from the drawer looking guilty while holding a jewellery box.
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Find out what happens on Fair City at 8pm on Wednesday night on RTÉ One. Catch up on all of the drama from Carrigstown on the RTÉ Player.
