Potara In The Perfect Couple by Elin Hilderbrand, the ending revolves around the resolution of the mysterious death of Merritt Monaco, Celeste Otis's maid of honor, on the day of Celeste's wedding. As the investigation unfolds, it becomes clear that multiple characters have been hiding secrets, leading to several possible suspects. Merritt's affair with Tag Winbury, the groom's father, and her pregnancy add to the complexity, while Celeste herself is torn between her feelings for her fiancé Benji and his best friend, Shooter.
Ultimately, it is revealed that Merritt's death was accidental. She had been drugged with barbiturates that were originally intended for someone else. The sedatives were stolen from Greer Winbury, Benji’s mother, by Abby, who had hoped to stop her husband from continuing his affair. However, the drug ended up in Merritt's water, leading to her disoriented state and accidental drowning. Greer decides to protect Abby’s secret to prevent the destruction of her family.
By the novel’s conclusion, Celeste breaks off her engagement with Benji and leaves the island, while Shooter vows to wait for her, hoping they can be together someday. The truth behind Merritt’s death remains hidden, as Greer chooses to carry the burden of this secret alone. The novel ends on a somewhat bittersweet note, leaving certain aspects of the characters’ fates unresolved.
This complex web of secrets, lies, and unintended consequences creates a gripping conclusion, in line with Hilderbrand's signature blend of mystery and emotional depth.