Sarah Pearson (previously Redback) was the mother of Ali Redback.
Sarah raised Ali as a single mother until she met and married Callum Pearson, but unbeknownst to her, Callum went on to abuse and rape Ali under their roof, leading to Ali falling pregnant with his baby. Ali later sneaked into school and left the baby in the changing rooms, but he was later found and he and Ali were taken to hospital to be checked over.
Sarah is first seen when she and Callum arrive in hospital, angry that Ali has had a baby at 16.
Callum wanted to give their son up for adoption to avoid Sarah and the authorities finding out what he did to his stepdaughter, but Ali was not okay with this as she wanted to keep her son and wanted to escape her stepfather once and for all. She asked Kyle to run away with her, but they were seen by Christopher Mead.
They began to run when Karen Fisher, Sarah and Callum arrived to stop them, with Callum grabbing Ali by force while she held her son. Ali shouted "I don't want him touching me again!" revealing to everyone that he raped her and that he was the one who got her pregnant, much to her mother's, teachers' and Kyle's horror, and Callum's fear now that the truth was revealed.
Kyle tried to defend Ali but he was shoved to the ground by Callum. Kyle later stood up and was shoved again until Chris Mead punched Callum and almost beat him up, but Karen stopped him. Then Ali's mother, Sarah, went hysterical and attacked her husband shouting "What have you done!?". Callum was later arrested while Kyle and Ali came back to school. Sarah is later seen apologising to Ali, ashamed that she had had no idea what had been happening under her roof.
Ali and her son were later taken into care by social services. What became of them afterwards is unknown, as they are not seen again.