The home as site of threat
Domestic suspense inverts the home's conventional meaning — sanctuary, retreat, safety — and makes it the location of maximum danger. Writing the home as a site of threat requires using every domestic detail against its ordinary reassurance: the routine that has been designed to make the protagonist predictable, the kindness that has been weaponized, the domestic comfort that makes departure seem impossible or irrational. The physical features of the home — its isolation, its design, the way it places the protagonist in a specific relationship to the people who share it — should serve the story's claustrophobia. The home in domestic suspense is the domestic thriller's equivalent of the haunted house: a place that should be safe and is not.