The Woman Next Door: A dark and twisty psychological thriller. Cass Green

middle class, loving – should be doing.

      Secure.

      Middle class.

      Loving?

      That’s what she’d thought.

      Mark is a doctor, specializing in IVF, who had made a decent living by combining private work with his NHS practice at the Whittington Hospital. But two years ago he had taken part in a BBC documentary set in the private clinic in Bloomsbury where he worked two days a week.

      The programme was called The Baby Business and it became something of a hit. Every week, thousands of people would discuss the ins and outs of various couples’ reproductive failures and successes (more of the former than the latter) over their morning coffees or at bus stops.

      There was Janine and Paul, a young man who had almost died from testicular cancer who longed now to be a father; the Hewlett twins, a pair of sisters who caused a spike in egg donation numbers for a few weeks in late 2013; and a stubbornly un-telegenic, spiky-mannered couple called Trudy and Gary. Every week they bickered with each other on camera and argued with the medical advice given. They were media catnip and Trudy’s lugubrious expression even prompted an internet meme in which her face was overlaid by a bleating goat. When their third attempt at IVF failed, the atmosphere shifted and she became Tragic Trudy.

      But Mark was the real star of the show. His salt-and-pepper hair, and warm twinkly manner as he delivered both good and bad news, proved to be a ratings winner. Before long he began to receive invitations onto various daytime television sofas.

      The BBC commissioned a follow-up series of TBB, as they called it. At home Mark privately called it BBB, for Babies Bring Bucks. All of this had been welcome in terms of money, but for Melissa, having a spotlight shone into her life, a spotlight that could throw every long-abandoned and grubby corner into the sharpest relief, it felt like a particularly cruel cosmic joke.

      Mark couldn’t understand why Melissa wouldn’t accompany him to the various events he was invited to with increasing frequency. She’d always managed to find an excuse. It wasn’t her thing. Or she felt like a night in. No one wanted her there, after all. They’d only be talking shop.

      And it was true that she had no interest in this world. Television people bored her. Their natural privilege was a balm that lubricated their way through life, so they never seemed to snag and falter. They had no idea, the Emmas and the Sachas and the Benedicts, of what the world was like for most of the population, despite the desire to entertain and document them.

      But her avoidance of the limelight had blown up in her face in more than one way. Firstly, Mark claimed that her unwillingness to enjoy his success helped push him into the arms of Sam. Mark said that the affair was over, really, before it started.

      ‘It meant nothing. It was a terrible mistake. I’m so sorry. I wouldn’t hurt you for the world.’

      As though it wasn’t far too late to say this.

      As a rule, Melissa worked hard to keep her younger self hidden; the small, hard Matryoshka doll that lurked beneath lacquered layers. Mark’s grovelling words, which seemed to drip so easily from his lying lips, finally forced her out of hiding.

      Melissa was as shocked as he was when she hit him, and the yellowish patina of his bruised cheek was noticed by Make-Up when he next turned up for filming.

      But Melissa was being carried on a tide now, one that washed her to Sam’s flat in a mansion block in Swiss Cottage. The younger woman’s eyes rounded almost comically and she gave a small gasp, like a hiss of gas from a balloon, as Melissa stepped out of the shadows and stood in front of her.

      Melissa spoke to her in a measured, calm voice. Afterwards, Sam scurried away on her long, coltish legs, scarlet-cheeked and breathing heavily. She’d left the programme soon after.

      They never spoke of it again but the gears of their marriage seemed to turn with more friction now; small irritations Melissa had previously overlooked grated more than ever.

      Mark suggested a meal out one evening – ‘to talk’. They went to the new restaurant that had opened down the road, which had just appeared in the Observer magazine. It was as they stepped towards the white canopy of The Bay, between miniature bay trees in square metal pots, that a photograph was snapped – or stolen – as Melissa thought of it. She hadn’t even noticed a flash.

      But a week later, a friend of Saskia’s had spotted the Society pages piece in Hello! magazine. Melissa, smiling, in her black sheath dress and heels, making an effort, and ‘Handsome Baby Doc Mark’, solicitously touching the small of his wife’s back as they entered, ‘the exciting new eatery that has opened close to the glamorous couple’s Dartmouth Park home.’

      Saskia had been surprised by Melissa’s muted reaction to the piece, and then sympathetic about the sudden onset of food poisoning that sent Melissa rushing to the downstairs toilet, where she vomited and shook so hard that she could feel her teeth rattling in her skull.

      It was just one picture. It meant nothing.

      That’s what she told herself in the coming weeks, and she almost began to believe it.

      But lately Melissa can’t seem to shake the feeling that her whole world is simply a snow globe that could tip over and shatter into a million lethal pieces with the slightest push of a fingertip.

      Glancing out of the window on the landing now, Melissa sees that the sky seems to be slung low, like a heavy white blanket. The light has a sickly, oppressive edge to it and the house feels full of shadows. Maybe this headache is a warning that a thunderstorm is coming. It feels as though even the weather is out to sabotage the day.

      Giving herself a mental shake, Melissa walks into the kitchen and feels marginally better at the industry there. The caterers have been busy all morning and the fridge is heaving with platters and dishes of colourful, tastefully arranged food, but every surface is clean and shining, ready for the guests to arrive a little later.

      Ocado have been and gone; the flowers have been delivered – a tall arrangement of lilies that perfectly offsets the newly hung green and gold wallpaper. Really, everything is looking perfect.

      Melissa sweeps her hair back from her shoulders, taking care not to ruin its smooth line. Now she only has to slip into the dress and sandals she bought for today and then it won’t be long until the first guests arrive.

      Finally, she allows herself to feel a ripple of pleasurable anticipation. The house looks great, she looks great, and it will be the kind of day that makes all her hard work worthwhile.

      Today is about her, Melissa.

      And Tilly. Of course.

      The doorbell chimes and Melissa walks down the hallway to open the door, wondering if there are any deliveries she has forgotten about.

      ‘Ah,’ she sighs. ‘Hello.’

      Hester – stiff helmet hair, horrible pink blouse, and brown slacks – smiles shyly up at her. She’s a small, scurrying sort of a woman who reminds Melissa of a squirrel.

      Melissa hates squirrels.

      The sight of Hester now causes a claustrophobic sensation of disappointment to crowd in, as if she is literally stealing her air. It takes her brain a second or two to see that the other woman appears to be holding a tray of scones, of all things.

      ‘What can I do for you?’ she says, eyeing them suspiciously, her smile tight but bright.

      Something shifts in Hester’s expression and she lowers the tray a little before her prim lips twitch.

      ‘It’s good to see you, Melissa,’ she says. ‘Well, I can see you’re having a function of some kind and I know you must be very busy. I was at a loose end today and I’ve been doing some baking. I made rather too many scones. I wondered if you might find a use for them?’

      Irritation spikes in Melissa’s chest.