kill her. She is taken to a psychiatric unit and diagnosed with postpartum psychosis. Sarah starts a relationship with Gary Windass (Mikey North) after he helps Bethany, who is experiencing school bullying. Sarah ends it when she discovers that Bethany has a crush on him. Bethany later overdoses on exercise pills, but she recovers and encourages Sarah to get back together with Gary. Sarah discovers that Bethany is in a relationship with Nathan Curtis (Christopher Harper) who is much older than her. Sarah does not approve of the relationship and takes a strong disliking to Nathan but accepts that it is Bethany's decision, taking her to the doctors for contraception. She later finds out that Bethany is being groomed and Nathan is subsequently arrested with Bethany moving back in with her mother. Sarah throws Gary out having been told he had a one-night stand with Nicola Rubinstein (Nicola Thorp) and got her pregnant. Sarah decides to get back with Gary after forgiving him for getting Nicola pregnant. Creation and casting The character of Sarah was created as the daughter of Brian and Gail Tilsley. The character was born on screen. Sarah was played by Lynsay King from 1987 to 1999. Lynsay's twin sister Leah, who died of cot death in 1987, alternated in the role of Sarah with Lynsay for a brief period until her death. In 1999, Tina O'Brien was recast in the role. O'Brien was given the part when she was 16, playing the character who was still only 12 at the time. She left the role in 2007, but has said that she would consider returning to the role in the future. O'Brien confirmed her return to the serial in October 2014, with her returning to filming in February 2015, and appearing on-screen from March 2015 onwards. Development Teenage pregnancy The character's teenage pregnancy storyline was created to highlight the risks of teenage pregnancy. However, the storyline has been a highly controversial and discussed storyline because of the possibility that it glamorised the idea. Despite this, it has been praised for its message. Actress Tina O'Brien has revealed that she was "naive" over the plot at the time of filming, oblivious that it would create much controversy. The storyline has been discussed in Television and criticism published by Intellect Books, which talked about the character and the storyline's impact. Internet grooming In May 2001, it was revealed