Maddie Collins is a friend of Arabella Taggart.
Maddie was attending her friend Arabella's birthday party. When she learned that someone posing as her cousin Rachel was there, she confronted her. It was Tessa Riley, who blackmailed Maddie to keep quiet with knowledge that Maddie was sleeping with Arabella's boyfriend, Tad. Despite her deal to keep it quiet, she told Arabella as she left the party.
Maddie was secretly sleeping with her friend Arabella's boyfriend, Tad.
She has a cousin named Rachel who lives in Newport Beach.
She and Arabella were friends. However, this likely ended when Arabella learned that Maddie was sleeping with her boyfriend, Tad.