After Kat breaks up with Anthony, he and Kat's teenage daughter Zoe Slater (Michelle Ryan) begin an affair. Zoe disowns Kat for disapproving of their relationship, and later runs away when Anthony reveals that he is still in love with Kat. Anthony and Kat's relationship resumes, but Zoe returns and catches them in bed together. Zoe then accepts they are together. After Kat fails to impress Anthony's colleagues she breaks up with him as he is about to propose. Kat discovers she is pregnant by him and decides to have an abortion. Her boss Alfie Moon (Shane Richie) persuades her not to, but she suffers a miscarriage while on her way to tell Anthony of the pregnancy. Kat then breaks up with Anthony again after realising he is not who she wants. In 2003, when Anthony causes the death of a pregnant patient, he leaves the Square to go travelling, but returns for Patrick's wedding to Yolande Duke (Angela Wynter) and Paul's funeral.