My room used to be a maid’s quarters, apparently. I worked out pretty quickly that I’m directly below Jules and Will’s room. Last night I could hear everything. I did try not to, obviously. But it was like the harder I tried, the more I heard every tiny sound, every groan and gasp. Almost as if they wanted to be heard.

They did it this morning too, but at least then I could get out, escape the Folly. We’re all under instructions not to go walking around the island after dark. But if it happens again this evening there’s no way I’m going to stay here. I’d prefer to take my chances with the peat bog and the cliffs.

I toggle my phone on to Airplane mode and off again, to see if anything happens to the little NO SIGNAL message, but it does fuck all. I doubt I have any new messages. I’ve sort of lost contact with all my mates. It’s not like we’ve fallen out. It’s more that I’ve left their world since I dropped out of uni. They sent me messages at first:

Hope you’re OK babes

Call if you need to chat Livs See you soon, yeah?

We miss you!

What happened????

Suddenly I feel like I can’t breathe. I reach for the bedside table. The

razor blade is there: so small, but so sharp. I pull down my jeans and press the razor’s edge to my inner thigh, up near my knickers, drag it into my flesh until the blood wells. The colour’s such a dark red against the blue-white skin there. It’s not a very big cut; I’ve made bigger. But the sting of it focuses everything to a point, to the metal entering my flesh, so that for a moment nothing else exists.

I breathe a little easier. Maybe I’ll do one more—

There’s a knock on my door. I drop the blade, fumbling to get my jeans closed. ‘Who is it?’ I call.

‘Me,’ Jules says, pushing the door open before I tell her she can come in, which is so Jules. Thank God I reacted quickly. ‘I need to see you in your bridesmaid dress,’ she says. ‘We’ve got a bit of time before Hannah and Charlie arrive. Johnno’s forgotten his bloody suit so I want to make sure that at least one member of the wedding party looks good.’

‘I’ve already tried it on,’ I say. ‘It definitely fits.’ Lie. I have no idea whether it fits or not. I was meant to come to the shop to try it on. But I found an excuse every time Jules tried to get me there: eventually she gave up and bought it, on condition I tried it on and told her it fitted straight away. I told her it did but I couldn’t make myself put it on. It’s been in its big stiff cardboard box since Jules had it delivered.

‘You may have tried it on,’ Jules says, ‘but I want to see it.’ She smiles at me, suddenly, like she’s just remembered to do so. ‘You can do it in our bedroom, if you like.’ She says it as if she’s offering some amazing privilege.

‘No thanks,’ I say. ‘I’d prefer to stay here—’

‘Come on,’ she says. ‘We’ve got a nice big mirror.’ I realise it isn’t optional. I go to the wardrobe and lift out the big duck-egg blue box. Jules’s mouth tightens. I know she’s pissed off I haven’t hung it up yet.

Growing up with Jules sometimes felt like having a second mother, or one who was like other mums – bossy, strict, all that stuff. Mum was never really like that, but Jules was.

I follow her up to their bedroom. Even though Jules is super tidy and even though there’s a window open to let the fresh air in, it smells of bodies in here, and men’s aftershave and, I think (I don’t want to think), of sex. It feels wrong being in here, in their private space.

Jules closes the door and turns to me with her arms folded. ‘Go on then,’ she says.

I don’t feel like I have much choice. Jules is good at making you feel that. I strip down to my underwear, keeping my legs pressed together in case my thigh’s still bleeding. If Jules sees I’ll have to tell her I’ve got my period. My skin prickles into goosebumps in the slight breeze coming through the window. I can feel her watching me; I wish she’d give me a bit of privacy. ‘You’ve lost weight,’ she says critically. Her tone is caring, but it doesn’t quite ring true. I know she’s probably jealous. Once, when she got drunk, she went on about how kids had got at her at school for being ‘chubby’. She’s always making comments

about my weight, like she doesn’t know I’ve always been skinny, ever since I was a little girl. But it’s possible to hate your body when you’re thin, too. To feel like it’s kept secrets from you. To feel like it’s let you down.

Jules is right, though. I have lost weight. I can only wear my smallest jeans at the moment, and even they slip down off my hips. I haven’t been trying to lose weight or anything. But that feeling of emptiness I get when I don’t eat as much … it matches how I feel. It seems right.

Jules is taking the dress out of the box. ‘Olivia!’ she says crossly. ‘Has this been in here the whole time? Look at these creases! This silk’s so delicate … I thought you’d look after it a bit better.’ She sounds as though she’s talking to a child. I guess she thinks she is. But I’m not a child any more.

‘Sorry,’ I say. ‘I forgot.’ Lie.

‘Well. Thank goodness I’ve brought a steamer. It’ll take ages to get all of these out, though. You’ll have to do that later. But for now just try it on.’

She has me put out my arms, like a child, while she shrugs the dress down over my head. As she does I spot an inch-long, bright pink mark on the inside of her wrist. It’s a burn, I think. It looks sore and I wonder how she did it: Jules is so careful, she’s never normally clumsy enough to burn herself. But before I can get a better look she has taken hold of my upper arms and is steering me towards the mirror so both of us can look at me in the dress. It’s a blush pink colour, which I would never wear, because it makes me look even paler. The same colour, almost, as the swanky manicure Jules made me get in London last week. Jules wasn’t happy with the state of my nails: she told the manicurist to ‘do the best you can with them’. When I look at my hands now it makes me want to laugh: the prissy princess pink shimmer of the polish next to my bitten down, bleeding cuticles.

Jules steps back, her arms folded and eyes narrowed. ‘It’s quite loose.

God, I’m sure this was the smallest size they had. For Christ’s sake, Olivia. I wish you’d told me it didn’t fit properly – I would have had it taken in. But …’ she frowns, moving around me in a slow circle. I feel that breeze through the door again, and shiver. ‘I don’t know, maybe it works a little loose. I suppose it’s a look, of sorts.’

I study myself in the mirror. The shape of the dress itself isn’t too offensive: a slip, bias cut, quite nineties. Something I might even have worn if it was another colour. Jules isn’t wrong; it doesn’t look terrible. But you can see my black pants and my nipples through the fabric.

‘Don’t worry,’ Jules says, as though she’s read my mind. ‘I’ve got a stick-on bra for you. And I’ve bought you a nude thong – I knew you wouldn’t have one yourself.’

Great. That will make me feel a lot less fucking naked.

It’s weird, standing together in front of the mirror, Jules behind me, both of us looking at my reflection. There are obvious differences between us. We’re totally different shapes, for one, and I have a slimmer nose – Mum’s nose – while Jules has better hair, thick and shiny. But when we’re together like this I can see that we’re more similar than people might think. The shape of our faces is the same, like Mum’s. You can see we’re sisters, or nearly.

I wonder if Jules is seeing it too: the similarity between us. Her expression is all odd and pinched-looking.

‘Oh, Olivia,’ she says. And then – I see it happen, in the mirror in front of us, before I actually feel it – she reaches out and takes my hand in hers. I freeze. It’s so unlike Jules: she is not big on physical contact, or affection. ‘Look,’ she says, ‘I know we haven’t always got along. But I am proud to have you as my bridesmaid. You do know that – don’t you?’

‘Yes,’ I say. It comes out as a bit of a croak.

Jules gives my hand a squeeze, which for her is like a full-blown hug. ‘Mum says you broke up with that guy? You know, Olivia, at your age it can feel like the end of the world. But then later you meet someone who you really click with and you understand the difference. It’s like Will and me—’

‘I’m fine,’ I say. ‘It’s fine.’ Lie. I do not want to talk about any of this with anyone. Jules least of all. She’s the last person who would understand if I told her I can’t remember why I ever bothered to put make-up on, or nice underwear, or buy new clothes, or go and get my hair cut. It seems like someone else did all those things.

Suddenly I feel really weird. Sort of faint and sick. I sway a bit, and Jules catches me, her hands gripping my upper arms hard.

‘I’m fine,’ I say, before she can even ask what’s wrong. I bend down and unfasten the over-fancy grey silk courts Jules has chosen for me, with their jewelled buckles, which takes ages because my hands have become all clumsy and stupid. Then I reach up and drag the dress over my head, so hard that Jules gives a little gasp, like she thinks it might tear. I didn’t use her pillow.

‘Olivia!’ she says. ‘What on earth has gotten into you?’

‘Sorry,’ I say. But I only mouth the words, no actual sound comes out.

‘Look,’ she says. ‘Just for these few days I’d like you to try and make a bit of an effort. OK? This is my wedding, Livvy. I’ve tried so hard to make it perfect. I bought this dress for you – I’d like you to wear it because I want you there, as my bridesmaid. That means something to me. It should mean something to you, too. Doesn’t it?’

I nod. ‘Yeah. Yeah, it does.’ And then, because she seems to be waiting for me to go on, I add, ‘I’m OK. I don’t know what … what that was before. I’m fine now.’

Lie.