‘Apart from the other half dozen people invited to this hen-do.’

I opened my eyes cautiously to find we were round and picking up speed in the opposite direction. ‘OK, it’s here. It looks like a footpath on the map but Flo’s definitely marked it.’

‘It is a footpath!’

She swung the wheel, we bumped through the opening, and the little car began jolting and bumping up a rutted, muddy track.

‘I believe the technical term is “unpaved road”,’ I said rather breathlessly, as Nina skirted a huge mud-filled trench that looked more like a watering hole for hippos, and wound round yet another bend. ‘Is this their drive? There must be half a mile of track here.’

We were on the last print-out, the one so big it was practically an aerial photograph, and I couldn’t see any other houses marked.

‘If it’s their drive,’ Nina said jerkily as the car bounced over another rut, ‘they should bloody well maintain it. If I break the chassis on this hire car I’m suing someone. I don’t care who, but I’m buggered if I’m paying for it.’

But as we rounded the next bend, we were suddenly there. Nina drove the car through a narrow gate, parked up and killed the engine, and we both got out, staring up at the house in front of us.

I don’t know what I’d expected, but not this. Some thatched cottage, perhaps, with beams and low ceilings. What actually stood in the forest clearing was an extraordinary collection of glass and steel, looking as if it had been thrown down carelessly by a child tired of playing with some very minimalist bricks. It looked so incredibly out of place that both Nina and I just stood, open-mouthed.

As the door opened I saw a flash of bright blondehair, and I had a moment of complete panic. This was a mistake. I should never have come, but it was too late to turn back.

Standing in the doorway was Clare.

Only – she was … different.

It was ten years, I tried to remind myself. People change, they put on weight. The people we are at 16 are not the people we are at 26 – I should know that, more than anyone.

But Clare – it was like something had broken, some light inside her had gone out.

Then she spoke and the illusion was broken. Her voice was the only thing that bore no resemblance to Clare whatsoever. It was quite deep, where Clare’s was high and girlish, and it was very, very posh.

‘Hi!!!’ she said, and somehow her tone gave the word three exclamation marks, and I knew, before she spoke again, who it was. ‘I’m Flo!’

You know when you see the brother or sister of someone famous, and it’s like looking at them, but in one of those fairground mirrors? Only one that distorts so subtly it’s hard to put your finger on what’s different, only that it is different. Some essence has been lost, a false note in the song.

That was the girl at the front door.

‘Oh my God!’ she said. ‘It’s so great to see you! You must be—’ She looked from me to Nina and picked the easy option. Nina is six-foot-one and Brazilian. Well, her dad’s from Brazil. She was born in Reading and her mum’s from Dalston. She has the profile of a hawk and the hair of Eva Longoria.

‘Nina, right?’

‘Yup.’ Nina stuck out a hand. ‘And you’re Flo, I take it?’

‘Yah!’

Nina shot me a look that dared me to laugh. I never thought people really said Yah, or if they did, they got it punched out of them at school or sniggered out of them at university Maybe Flo was made of tougher stuff.

Flo shook Nina’s hand enthusiastically and then turned to me with a beaming smile. ‘In that case you’re … Lee, right?’

‘Nora,’ I said reflexively.

‘Nora?’ She frowned, puzzled.

‘My name’s Leonora,’ I said. ‘At school I was Lee, but now I prefer Nora. I did mention in the email.’

I’d always hated being Lee. It was a boy’s name, a name that lent itself to teasing and rhyme. Lee Lee needs a wee. Lee Lee smells of pee. And then with my surname, Shaw: We saw Lee Shaw on the sea shore.

Lee was dead and gone now. At least I hoped so.

‘Oh, right! I’ve got a cousin called Leonora! We call her Leo.’

I tried to hide the flinch. Not Leo. Never Leo. Only one person ever called me that.

The silence stretched, until Flo broke it with a slightly brittle laugh. ‘Ha! Right. OK. Well, this is going to be so much fun! Clare’s not here yet – but as maid of honour I felt I should do my duty and get here first!’

‘What hideous tortures have you got lined up for us then?’ Nina asked as she yanked her case across the threshold. ‘Feather boas? Chocolate penises? I warn you, I’m allergic to them – I have an anaphylactic reaction. Don’t make me get my Epipen out.’

Flo laughed nervously. She looked at me and then back at Nina, trying to gauge whether Nina was joking. Nina’s delivery is hard to read if you don’t know her. Nina stared back seriously, and I could tell she was wondering whether to dangle the bait a bit closer.

‘Lovely, um … house,’ I said, to try to head her off, although in truth lovely wasn’t the word I was thinking of. In spite of the trees to either side, the place looked painfully exposed, baring its great glass facade to the eyes of the whole valley.

‘Isn’t it!’ Flo beamed, looking relieved to be back on safe ground. ‘It’s actually my aunt’s holiday house, but she doesn’t come here much in the winter – too isolated. Sitting room’s through here …’ She led us through an echoing hallway the full height of the house, and into a long, low room with the entire opposite wall made of glass, facing the forest. There was something strangely naked about it, like we were in a stage set, playing our parts to an audience of eyes out there in the wood. I shivered, and turned my back to the bare glass, looking round the room. In spite of the long squashy sofas, the place felt oddly bare – and after a second I realised why. It wasn’t just the lack of clutter and the minimalist decor – two pots on the mantelpiece, a single Mark Rothko painting on the wall – but the fact that there wasn’t a single book in the whole place. It didn’t even feel like a holiday cottage – every place I’ve ever stayed in has had a shelf of curling Dan Browns and Agatha Christies. It felt more like a show home.

‘Landline is in here.’ Flo pointed to a vintage dial-and-cord phone that looked strangely lost in this modernist environment. ‘Mobile reception is very glitchy so feel free to use it.’

But I wasn’t looking at the phone. Above the stark modern fireplace was something even more out of place: a polished shotgun, perched on wooden pegs drilled into the wall. It looked like it had been transplanted from a country pub. Was it real?

I tried to tear my eyes away as I realised Flo was still talking.

‘… and upstairs are the bedrooms,’ she finished. ‘Want a hand with those cases?’

‘No, I’m fine,’ I said, at the same time Nina said, ‘Well, if you’re offering …’

Flo looked taken aback, but gamely took Nina’s huge, wheeled case and began to lug it up the flight of frosted-glass stairs.

‘As I was saying,’ she panted as we rounded the newel post, ‘there’s four bedrooms. I thought we’d have me and Clare in one, you guys in another, Tom will have to have his own, obvs.’

‘Obvs,’ said Nina, straight-faced.

I was too busy processing the news that I’d be sharing a room. I’d assumed I’d have my own space to retreat to.

‘And that just leaves Mels – Melanie, you know – as the odd one out. She’s got a six-month-old so I thought out of us girls, she probably deserved a room of her own the most!’

‘What? She’s not bringing it, is she?’ Nina looked genuinely alarmed.

Flo gave a honking laugh and then put her hand up to her mouth, smothering the noise self-consciously. ‘No! Just, you know, she’ll probably need a good night’s sleep more than the rest of us.’

‘Oh, OK.’ Nina peered into one of the bedrooms. ‘Which one is ours then?’

‘The two back ones are the biggest. You and Lee can have the one on the right if you like, it’s got twin beds. The other one’s got a four-poster double, but I don’t mind squishing up with Clare.’