Walton explains the cause of her behaviour, ``You find out much later on that it's because of something that happened in her past. Her obsession really is getting full-on ... She's jealous of anybody who gets Jake's attention.'' After Jake's sister Steph Cunningham (Carley Stenson) is diagnosed with cervical cancer Loretta pretends _she_ once had leukaemia in order to trap Jake. <sep>, Pronoun: she <sep>, A: Steph Cunningham <sep>, B: Loretta