‘Liam Stubbs fancies you. You could totally ride that.’

‘Any certified pair of X chromosomes could ride Liam Stubbs.’ Jess closed the window. ‘I’m better off reading a book. Besides, I think the kids have had enough upheaval in their lives without playing Meet Your New Uncle. Right.’ She looked up, wrinkled her nose at the sky. ‘I’ve got to get the tea on and then I’ve got to get ready for the pub. I’ll do a quick ring-round before I go, see if any of the clients want any extras doing. And, you never know, she might not cancel us.’

Nathalie lowered her window, and blew out a long trail of smoke. ‘Sure, Dorothy. And our next job is going to be cleaning the Emerald City at the end of the Yellow Brick Road.’

Number fourteen Seacove Avenue was filled with the sound of distant explosions. Tanzie had calculated recently that, since he’d turned sixteen, Nicky had spent 88 per cent of his spare time in his bedroom. Jess could hardly blame him.

She dropped her cleaning crate in the hall, hung up her jacket, made her way upstairs, feeling the familiar faint dismay at the threadbare state of the carpet, and pushed at his door. He was wearing a set of headphones and shooting somebody; the smell of weed was strong enough to make her reel.

‘Nicky,’ she said, and someone exploded in a hail of bullets. ‘Nicky.’ She walked over to him and pulled his headphones off, so that he turned, his expression briefly bemused, like someone hauled from sleep. ‘Hard at work, then?’

‘Revision break.’

She picked up an ashtray and held it towards him. ‘I thought I told you.’

‘It’s from last night. Couldn’t sleep.’

‘Not in the house, Nicky.’ There was no point telling him not at all. They all did it around here. She told herself she was lucky he had only started at fifteen.

‘Is Tanzie back yet?’ She stooped to pick up stray socks and mugs from the floor.

‘No. Oh. The school rang after lunch.’

‘What?’

He typed something into the computer then turned to face her. ‘I don’t know. Something about school.’

It was then that she saw it. She lifted a lock of that dyed black hair, and there it was: a fresh mark on his cheekbone. He ducked away. ‘Are you okay?’

He shrugged, looked away from her.

‘Did they come after you again?’

‘I’m fine.’

‘Why didn’t you call me?’

‘No credit.’ He leant back and fired a virtual grenade. The screen exploded into a ball of flame. ‘The number’s on the table. If it’s about me, I was there on Friday. They must have just not seen me.’ He replaced his earphones and went back to the screen.

Nicky had come to live with Jess full time eight years previously. He was Marty’s son by Della, a woman he’d gone out with briefly in his teens. He had arrived silent and wary, his limbs thin and elongated, his appetite raging. His mother had fallen in with a new crowd, finally disappearing to somewhere in the Midlands with a man called Big Al, who wouldn’t look anyone in the eye and clutched an ever-present can of Tennents Extra like a hand grenade in his oversized fist. Nicky had been found sleeping in the locker rooms at school, and when the social workers called again, Jess had said he could come to them. ‘Just what you need,’ Nathalie had said. ‘Another mouth to feed.’

‘He’s my stepson.’

‘You’ve met him twice in four years. And you’re not even twenty.’

‘Well, that’s how families are, these days. It’s not all two point four.’

Afterwards, she sometimes wondered whether that had been the final straw; the thing that had caused Marty to abdicate responsibility for his family altogether. But Nicky was a good kid, under all the raven hair and eyeliner. He was sweet to Tanzie, and on his good days he talked and laughed and allowed Jess the occasional awkward hug, and she was glad of him, even if it sometimes felt as if she had basically acquired one more person to feel anxious about.

She stepped out into the garden with the phone and took a deep breath, her stomach a knot of anxiety. ‘Um … hello? It’s Jessica Thomas here. I had a message to call.’

A pause.

‘If it’s about Nicky, I did check his study-periods rota. He said he was allowed to do revision at home and I thought that this was how they –’

‘Mrs Thomas, I was calling you about Tanzie.’

A clench of panic. She glanced down at the number, registering. ‘Tanzie? Is … is everything all right?’

‘Sorry. I should have said. It’s Mr Tsvangarai here, Tanzie’s maths teacher.’

‘Oh.’ She pictured him: a tall man in a grey suit. Face like a funeral director’s.

‘I wanted to talk to you because a few weeks ago I had a very interesting discussion with a former colleague of mine who works for St Anne’s.’

‘St Anne’s?’ Jess frowned. ‘The private school?’

‘Yes. They have a scholarship programme for children who are exceptionally gifted in maths. And, as you know, we had already earmarked Tanzie as Gifted and Talented.’

‘Because she’s good at maths.’

‘Better than good. Well, we gave her the paper to sit last week. I don’t know if she mentioned it? I sent a letter home but I wasn’t sure you saw it.’

Jess squinted at the sky. Seagulls wheeled and swooped against the grey. A few gardens down Terry Blackstone had started singing along to a radio. He had been known to do the full Rod Stewart if he thought nobody was looking.

‘We got the results back this morning. And she has done well. Extremely well. Mrs Thomas, if you’re agreeable they would like to interview her for a subsidized place.’

She found herself parroting him. ‘A subsidized place?’

‘For certain children of exceptional ability St Anne’s will forgo a significant proportion of the school fees. It means that Tanzie would get a top-class education. She has an extraordinary numerical ability, Mrs Thomas. I do think this could be a great opportunity for her.’

‘St Anne’s? But … she’d need to get a bus across town. She’d need all the uniform and kit. She – she wouldn’t know anyone.’

‘She’d make friends. But these are just details, Mrs Thomas. Let’s wait and see what the school comes up with. Tanzie is an extraordinarily talented girl.’ He paused. When she didn’t say anything, he lowered his voice: ‘I have been teaching maths for almost twenty-two years, Mrs Thomas. And I have never met a child who grasped mathematical concepts like she does. I believe she is actually exceeding the point where I have anything to teach her. Algorithms, probability, prime numbers –’

‘Okay. This is where you lose me, Mr Tsvangarai. I’ll just go with gifted and talented.’

He chuckled. ‘I’ll be in touch.’

She put down the phone and sat heavily on the white plastic garden chair that had been there when they’d moved in and had now grown a fine sheen of emerald moss. She stared at nothing, in through the window at the curtains that Marty always thought were too bright, at the red plastic tricycle that she had never got round to getting rid of, at next door’s cigarette butts sprinkled like confetti on her path, at the rotten boards in the fence that the dog insisted on sticking his head through. Despite what Nathalie referred to as her frankly misguided optimism, Jess found her eyes had filled unexpectedly with tears.

There were lots of awful things about the father of your children leaving: the money issues, the suppressed anger on behalf of your children, the way most of your coupled-up friends now treated you as if you were some kind of potential husband-stealer. But worse than that, worse than the endless, relentless, bloody exhausting financial and energy-sapping struggle, was that being a parent on your own when you were totally out of your depth was actually the loneliest place on earth.

2.

Tanzie

Twenty-six cars sat in the car park at St Anne’s. Two rows of thirteen big shiny four-wheel-drives faced each other on each side of a gravel path, sliding in and out of the spaces at an average angle of 41 degrees, before the next in line moved in.

Tanzie watched them as she and Mum crossed the road from the bus stop, the drivers talking illegally into phones or mouthing at bug-eyed blond babies in the rear seats. Mum lifted her chin and fiddled with her keys in her free hand, as if they were actually her car keys and she and Tanzie just happened to have parked somewhere nearby. She kept glancing behind her. Tanzie guessed she was worried she was going to bump into one of her cleaning clients and they were going to ask what she was doing there.

She had never been inside St Anne’s, although she’d been past it on the bus at least ten times because the NHS dentist was on this road. From the outside, there was just an endless hedge, trimmed to exactly 90 degrees (she wondered if the gardener used a protractor) and those big trees where the branches hung low and friendly, sweeping out across the playing fields as if they were there to shelter the children below.

The children at St Anne’s did not swing bags at each other’s heads, or bundle up in huddles by the corner of the playground, backing someone against the wall to tax their lunch money. There were no weary-sounding teachers trying to herd the teenagers into classrooms. The girls had not rolled their skirts six times over at the waistband or backcombed their hair. Not a single person was smoking. A lot of them wore glasses. Her mother gave her hand a little squeeze. Tanzie wanted her to stop looking so nervous. ‘It’s nice, isn’t it, Mum?’

She nodded. ‘Yes.’ It came out as a squeak.

‘Mr Tsvangarai told me that every single one of their sixth-formers who did maths got A or A starred. That’s good, isn’t it?’