When Lisa comes home on Halloween evening, something is wrong. The porch light is on. The house is warm. And through the front windows, she sees a family inside. They are not masked intruders. They are not violent. They are polite, tired, almost reasonable. And they will not leave.

As trick-or-treaters gather outside and her calls for help fail to make the situation legible, Lisa is forced into a strange and escalating crisis: how do you defend a boundary when the people crossing it insist they are simply in need? What begins as a quiet domestic intrusion becomes a psychological struggle over safety, guilt, compassion, entitlement, and the right to protect one's own life without apology. This Is My House is a tense literary suspense novel about the moment a private home becomes negotiable - and the woman who must remember where the line is before someone else redraws it.