
The narrator of this book is a mother who has already lost one round: her husband is gone, and the woman who took him is now the one standing behind her daughter in the doorway of a very expensive house. Her sixteen-year-old, Brie, has a new stud in her nose, has dropped out of college and looks at her own mother the way you look at somebody selling something. Leanne's arm across the girl's shoulders says the rest of it without needing a line of dialogue.
So she does what a frightened mother does, which is watch. She watches Brie with a man much older than her and promises herself she will do whatever it takes, and then the phone rings in the small hours and her daughter says she is in a cell and that she killed him. From that point the book stops being about a custody argument and becomes about a woman being built into a suspect, bottle by bottle and lie by lie, with a stepmother only too happy to help.

K. L. Slater has written sixteen of these and it shows in the best way: the machinery starts in the first minute and never idles. The setup is a classic of the domestic thriller, the ex-wife, the new wife, the daughter in the middle, and what makes it work here is that the narrator is not a reliable pair of eyes and knows it. Clare Corbett reads her with a tight, reasonable voice that slowly stops sounding reasonable, and the performance is the reason the unreliable bits do not feel like a trick.
The best material is the framing sequence. Once Leanne tells the police that her predecessor is unstable, the book becomes a countdown of small, ordinary things being used as evidence: bottles in a bin, something said at work, a piece of footage of a woman shouting in a street. It is much more frightening than a chase, because every element is something a real person could have in their life, and Slater is very good at making a neighbourhood feel like a courtroom.
Brie is the other strong piece. She is sulky, she is cruel to her mother in the way teenagers are, and she is also clearly frightened, and the book never resolves that ambiguity too early, which matters because the whole plot rests on it. The scenes in the stepmother's house are the tensest in the audiobook: nothing happens in them, and everything happens in them.
Clare Corbett's narration is nine hours and nine minutes of a woman trying to stay calm, and she makes the escalation feel physical. She does the daughter's voice without turning her into a caricature and she keeps the male characters distinct without doing accents for effect. The production is clean, with no music and no gimmicks, which is right for this kind of book.
Where it is merely good rather than exceptional is the last act. The twists arrive on schedule, they are competently planted, and at least one of them I saw coming about an hour before the reveal, which takes the sting out of it. This is the trade Slater makes: she is reliable, she is fast, and she is rarely surprising. A quarter of the ratings on this one sit at three stars and I understand why, having listened, my own reaction was admiration rather than shock. If you have read a lot of domestic thrillers, you will recognise the shape.
That said, for a nine-hour audiobook on a wet weekend it is close to ideal, and it is much better made than most of what comes out in this genre. If you want a thriller that turns the screw slowly and does not cheat, this does the job. The site has two more Slater novels, The Chef and Message Deleted, if you want to see the same hand at work.
Her Stepmother's House is a domestic thriller about a mother who has lost her husband to another woman and is now watching that woman raise her daughter. When sixteen-year-old Brie stops coming home, the narrator starts watching her, sees her with a much older man, and then gets a call in the middle of the night: Brie is in a cell and says she has killed him. Nine hours and nine minutes, read by Clare Corbett.
With the trial you spend it on whichever title you like, this one included, and you can cancel from your account in a couple of clicks. The title you take stays in your library even if you cancel, so nothing disappears at the end of the period. Playback speed, the sleep timer and picking up exactly where you stopped all work the way you would expect.
Nine hours is the right length for this kind of book: one long evening, or two, with short chapters that make it easy to keep going. Clare Corbett is one of the best narrators working in British crime audio and she carries the unreliable side of the story without overplaying it. It is an Audible Studios production, so this is where you will find it.