Constance's daughter who arrives after her mother's death. She suspects Helen and Helen's ex of murdering her mother, which becomes the central conflict after the cover-up.
Maternal lineage that triggers the investigation and final confrontation.
Adversarial dynamic where Susan's suspicion directly threatens Helen's safety.
Investigative tension placing Maurice under direct scrutiny from his stepdaughter.
Explore the full interactive character relationship map of A Quiet Place to Kill