Lily is the eldest child in the Green family. She has two younger half-sisters, (Bliss and Pixie), and one younger half-brother, (Baxter). She often has to take care of them when their mother, Kate Green, goes out to the pub, newsagent or off-licence. Although Lily does not usually mind being shouldered with the responsibility, she sometimes resents it. When Lily's mother meets Gordon, her new boyfriend, at a local club, Kate is convinced that her life has improved and she feels as if she and Gordon 'are on a rollercoaster to heaven.' Lily becomes cross with her mother for coming home very late. That night, Lily takes care of her brother and sisters by drawing and watching Tracy Beaker. The next day, Kate takes her children on a frivolous shopping expedition and uses a credit card, which causes Lily to become very suspicious. She worries about where and how her mother obtained the card.
Kate flies to Spain to be with Gordon. Lily is fearful and angry when her mother suggests that Mikey, Kate's ex-husband, look after the rest of the family while Kate travels to Spain. Kate tells Lily that she is yet to reveal to Gordon that she has children. She further annoys Lily when Kate reveals that she feels as if she deserves a holiday from living in a 'dump'. Kate leaves a voicemail message for Mikey to tell him that he must take care of the children while Kate is on holiday. Lily is afraid of Mikey. By the time Mikey returns Kate's call, Kate has already left for Spain. Mikey tells Lily he is on his way to Glasgow and tells Lily to tell her mother not to go anywhere. Lily pretends that she has delivered the message.