In 2014, Tony falls for Sinead and she agrees to sleep with him so that she can film it and show Diane who she hates as Diane is blaming her for the death of her daughter, Katy. However, Sinead ends up actually falling for Tony and decides not to show Diane the tape. Tony and Sinead continue their affair, however when Cindy catches them kissing, she demands money from Tony so that she can run away with Rhys, who she believes is still alive due to her bipolar disorder . When Tony and Sinead's affair nearly results in the twins going missing, Tony attempts to call it off and instead gets engaged to Diane. However, Tony and Sinead end up continuing their affair and stay at a hotel together. Diane is suspicious over Tony's hotel visit and attempts to find out the truth, and when she speaks to the hotel receptionist she discovers that Tony has been having an affair. Diane is furious with Tony, therefore Tony hides the fact that the girl was Sinead in order to stop further problems. Tony then ends the affair with Sinead, and after speaking to Diane she agrees to get married again. Sinead later discovers she is pregnant.