I still find it extraordinary that they chose to stay there, in that house, in my house. I couldn’t believe it when he told me. I loved that house. I was the one who insisted we buy it, despite its location. I liked being down there on the tracks, I liked watching the trains go by, I enjoyed the sound of them, not the scream of an inner-city express but the old-fashioned trundling of ancient rolling stock. Tom told me, “It won’t always be like this, they’ll eventually upgrade the line and then it will be fast trains screaming past,” but I couldn’t believe it would ever actually happen. I would have stayed there, I would have bought him out if I’d had the money. I didn’t, though, and we couldn’t find a buyer at a decent price when we divorced, so instead he said he’d buy me out and stay on until he got the right price for it. But he never found the right buyer, instead he moved her in, and she loved the house like I did, and they decided to stay. She must be very secure in herself, I suppose, in them, for it not to bother her, to walk where another woman has walked before. She obviously doesn’t think of me as a threat. I think about Ted Hughes, moving Assia Wevill into the home he’d shared with Plath, of her wearing Sylvia’s clothes, brushing her hair with the same brush. I want to ring Anna up and remind her that Assia ended up with her head in the oven, just like Sylvia did.

I must have fallen asleep, the gin and the hot sun lulling me. I woke with a start, scrabbling around desperately for my handbag. It was still there. My skin was prickling, I was alive with ants, they were in my hair and on my neck and chest and I leaped to my feet, clawing them away. Two teenage boys, kicking a football back and forth twenty yards away, stopped to watch, bent double with laughter.

The train stops. We are almost opposite Jess and Jason’s house, but I can’t see across the carriage and the tracks, there are too many people in the way. I wonder whether they are there, whether he knows, whether he’s left, or whether he’s still living a life he’s yet to discover is a lie.

SATURDAY, JULY 13, 2013

MORNING

I know without looking at a clock that it is somewhere between seven forty-five and eight fifteen. I know from the quality of the light, from the sounds of the street outside my window, from the sound of Cathy vacuuming the hallway right outside my room. Cathy gets up early to clean the house every Saturday, no matter what. It could be her birthday, it could be the morning of the Rapture—Cathy will get up early on Saturday to clean. She says it’s cathartic, it sets her up for a good weekend, and because she cleans the house aerobically, it means she doesn’t have to go to the gym.

It doesn’t really bother me, this early-morning vacuuming, because I wouldn’t be asleep anyway. I cannot sleep in the mornings; I cannot snooze peacefully until midday. I wake abruptly, my breath jagged and heart racing, my mouth stale, and I know immediately that’s it. I’m awake. The more I want to be oblivious, the less I can be. Life and light will not let me be. I lie there, listening to the sound of Cathy’s urgent, cheerful busyness, and I think about the clothes on the side of the railway line and about Jess kissing her lover in the morning sunshine.

The day stretches out in front of me, not a minute of it filled.

I could go to the farmer’s market on the Broad; I could buy venison and pancetta and spend the day cooking.

I could sit on the sofa with a cup of tea and Saturday Kitchen on TV.

I could go to the gym.

I could rewrite my CV.

I could wait for Cathy to leave the house, go to the off-licence and buy two bottles of sauvignon blanc.

In another life, I woke early, too, the sound of the 8:04 rumbling past; I opened my eyes and listened to the rain against the window. I felt him behind me, sleepy, warm, hard. Afterwards, he went to get the papers and I made scrambled eggs, we sat in the kitchen drinking tea, we went to the pub for a late lunch, we fell asleep, tangled up together in front of the TV. I imagine it’s different for him now, no lazy Saturday sex or scrambled eggs, instead a different sort of joy, a little girl tucked up between him and his wife, babbling away. She’ll be just learning to talk now, all “Dada” and “Mama” and a secret language incomprehensible to anyone but a parent.

The pain is solid and heavy, it sits in the middle of my chest. I cannot wait for Cathy to leave the house.

EVENING

I am going to see Jason.

I spent all day in my bedroom, waiting for Cathy to go out so that I could have a drink. She didn’t. She sat steadfast and unmovable in the living room, “just catching up on a bit of admin.” By late afternoon I couldn’t stand the confinement or the boredom any longer, so I told her I was going out for a walk. I went to the Wheatsheaf, the big, anonymous pub just off High Street, and I drank three large glasses of wine. I had two shots of Jack Daniel’s. Then I walked to the station, bought a couple of cans of gin and tonic and got onto the train.

I am going to see Jason.

I’m not going to visit him, I’m not going to turn up at his house and knock on the door. Nothing like that. Nothing crazy. I just want to go past the house, roll by on the train. I’ve nothing else to do, and I don’t feel like going home. I just want to see him. I want to see them.

This isn’t a good idea. I know it’s not a good idea.

But what harm can it do?

I’ll go to Euston, I’ll turn around, I’ll come back. (I like trains, and what’s wrong with that? Trains are wonderful.)

Before, when I was still myself, I used to dream of taking romantic train journeys with Tom. (The Bergen Line for our fifth anniversary, the Blue Train for his fortieth.)

Hang on, we’re going to pass them now.

The light is bright, but I can’t see all that well. (Vision doubling. Close one eye. Better.)

There they are! Is that him? They’re standing on the terrace. Aren’t they? Is that Jason? Is that Jess?

I want to be closer, I can’t see. I want to be closer to them.

I’m not going to Euston. I’m going to get off at Witney. (I shouldn’t get off at Witney, it’s too dangerous, what if Tom or Anna sees me?)

I’m going to get off at Witney.

This is not a good idea.

This is a very bad idea.

There’s a man on the opposite side of the train, sandy blond hair veering towards ginger. He’s smiling at me. I want to say something to him, but the words keep evaporating, vanishing off my tongue before I have the chance to say them. I can taste them, but I can’t tell if they are sweet or sour.

Is he smiling at me, or is he sneering? I can’t tell.

SUNDAY, JULY 14, 2013

MORNING

My heartbeat feels as though it is in the base of my throat, uncomfortable and loud. My mouth is dry, it hurts to swallow. I roll onto my side, my face turned to the window. The curtains are drawn, but what light there is hurts my eyes. I bring my hand up to my face; I press my fingers against my eyelids, trying to rub away the ache. My fingernails are filthy.

Something is wrong. For a second, I feel as though I’m falling, as though the bed has disappeared from beneath my body. Last night. Something happened. The breath comes sharply into my lungs and I sit up, too quickly, heart racing, head throbbing.