The way this is going Wilf is going to convince Hannah and Meryl that Kieran is the traitor and kick him out....BUT if Kieran gets revealed as the traitor then they must realise that there is a second traitor as Kieran got booted at the very start and he wasn't there when the original three traitors were picked!
IF they are smart enough to figure this out then the next one to go is Aaron. At this point the producers/Claudia might tell Aaron to leave the room without revealing if he is faithful or not.
If he is allowed to say he is a faithful, the next one to go is Meryl, unless Hannah sees the light.
If he isn't allowed to reveal his status then depending how paranoid Hannah is she might say to Wilf to vote Meryl out just to be safe or the game ends there.
Either way Wilf is going for the win unless he majorly fucks up or some twists happen.