He is devastated to learn that she registered Ruby's birth alone, leaving his name off the birth certificate, so he has no parental rights. Having no other choice, Tyrone allows Kirsty to stay and they agree that she will go back to work and he will be a stay-at-home father. Worried about Tyrone being isolated, Fiz persuades Katy to take Tyrone and Ruby to a playgroup where he befriends a woman named Angela. When Kirsty finds a text from Angela, inviting him to her daughter's birthday party, she is jealous and asks Tyrone not to go. Fiz finds out and confronts Kirsty, who tampers with Fiz's sewing machine, causing a nasty injury to Fiz's fingers, to teach her a lesson. Kirsty tells Fiz that she tampered with the machine, but when Fiz tells people, no one believes her so Fiz reports Kirsty to the police and they question her at work. Furious, Kirsty attacks her again, unaware that Tyrone is in Fiz's kitchen. Feeling she cannot trust Tyrone because Fiz has been texting him, she takes his keys and phone with her to work the next day. When Tyrone complains, Kirsty attacks him again but this time shows no remorse and demands Tyrone apologise, which he eventually does. Distraught, Tyrone plans to snatch Ruby and run but Fiz and Tommy persuade him that he should marry Kirsty so he will have parental rights. Needing comfort, Fiz and Tyrone begin an affair, despite his plans to marry Kirsty. Tina is horrified when she finds out and tells Tyrone to take Kirsty to court, rather than marry her, but he insists he knows what he is doing and goes ahead regardless. Unfortunately, this plan costs Fiz her job at Underworld but Tyrone makes amends by getting her a job at the café so things settle down again but Kirsty demands Tyrone have no further contact with Fiz. This sparks another beating when she finds Fiz has given him a birthday card and, feeling guilty, Kirsty wants to call off the wedding, but Tyrone refuses. On the day of Kirsty and Tyrone's stag-do/hen party, Kirsty finds Tyrone's secret phone with messages that detail Tyrone's plan for parental responsibility. In revenge, she invites Fiz to the wedding and promptly reveals their affair to the congregation before refusing to marry Tyrone. She takes Ruby and leaves, eventually going home to confront Tyrone. He admits everything