Characterisation Reece was first branded by official
Neighbours production as "an American new to Erinsborough who’s not quite who she appears to be". Herbison called Reece "dynamic and unpredictable", adding that she would appeal to "loyal viewers". Barton described Reece as coming from a "very very structured, very kind of corporate-y, business-y background" as she is the daughter of American businessman, Conrad Sinclair, who had recently invested in
Lassiter's Hotel. Conrad sends Reece to Erinsborough to look over his investment. Barton explained that Reece was excited to come to Australia as she had "never really had a chance to take a break from work and get away from her family; she's never had a chance to live a normal life and not be under her father's strict guidance". Furthermore, she said that her character sees her trip as a way to relax, which she had "not been doing what she's supposed to be doing!" In the online series
Ramsay Street Revelations, Barton quipped Reece as "cool. She's interesting. She's quite a bossy lady because she's worked very hard her whole life and she comes from a privileged background. Talking to Digital Spy, Barton believed that the writers had created the role of Sinclair while keeping her in mind, adding that it helped her memorise her lines.
Relationship with Byron Stone Reece is first seen in Episode 8904, waiting to be served at the Lassiter's reception. Paul asks bell porter
Byron Stone (Xavier Molyneux) to escort Reece to her room, however while in the lift, they pursue a sexual liaison that continues into the bedroom. Barton described these scenes by saying, "On my first day, I was pretty much sent into some pretty serious scenes with Xavier." She called it "quite a lot right off the bat, so that was a little bit funny, but we laugh about it now". Reece and Byron officially declare themself dating, however keep it secret to avoid workplace complications. Barton said that Byron was "a bit of escapism for Reece, that's for sure". Due to Reece's background, Barton thought that the relationship was abnormal in that Reece did not expect to "fall for the bell boy, but, hey! These things happen!" Molyneux called intimate scenes between Reece and Byron "hot and heavy". He explained that he and Barton needed to "figure out exactly how we fit together and what chemistry we do have" in order to make Reece and Byron's relationship seem realistic, so went through the
Neighbours intimacy team, which Molyneux called "fantastic". Dennis told
Inside Soap that Paul "thoroughly dislikes Reece – and when he sets out to make somebody's life a misery, he does it well!" Paul accuses Reece of engaging with Byron's
escorting, a service he previously provided. Reece, unaware of this past job, questions Byron and forces him to explain himself.
Sister and departure It was revealed on 2 October 2023 that the true reason for Reece's arrival in Erinsborough was to search for her missing sister,
Krista Sinclair (Majella Davis). She told
Inside Soap, "We find out that she's really in Australia because of her sister, and there's a lot going on there." To social media, she explained that Reece had come to Australia "out of concern for her younger sister". By October 2023, Barton revealed that she had concluded filming her stint and that Reece would be departing Erinsborough shortly. The following episode, Reece is forced to leave Erinsborough after her father suffers a stroke in America. Barton exited the serial on 23 November 2023. Barton was removed from the show's opening titles the following episode. ==Storylines==