This time Madeline managed not to laugh. Chloe currently trod a very fine line between adorable and obnoxious. Madeline probably trod the same line herself.

Madeline pulled up behind the little blue Mitsubishi at a red light. The young driver was still looking at her mobile phone. Madeline banged on her car horn. She saw the driver glance in her rearview mirror, while all her passengers craned around to look.

“Put down your phone!” she yelled. She mimicked texting by jabbing her finger in her palm. “It’s illegal! It’s dangerous!”

The girl stuck her finger up in the classic up-yours gesture.

“Right!” Madeline pulled on her emergency brake and put on her hazard lights.

“What are you doing?” said Chloe.

Madeline undid her seat belt and threw open the car door.

“But we’ve got to go to orientation!” said Chloe in a panic. “We’ll be late! Oh, calamity!”

“Oh, calamity” was a line from a children’s book that they used to read to Fred when he was little. The whole family said it now. Even Madeline’s parents had picked it up, and some of Madeline’s friends. It was a very contagious phrase.

“It’s all right,” said Madeline. “This will only take a second. I’m saving young lives.”

She stalked up to the girl’s car on her new stilettos and banged on the window.

The window slid down, and the driver metamorphosed from a shadowy silhouette into a real young girl with white skin, sparkly nose ring and badly applied, clumpy mascara. She looked up at Madeline with a mixture of aggression and fear. “What is your problem?” Her mobile phone was still held casually in her left hand.

“Put down that phone! You could kill yourself and your friends!” Madeline used the exact same tone she used on Chloe when she was being extremely naughty. She reached in the car, grabbed the phone and tossed it to the openmouthed girl in the passenger seat. “OK? Just stop it!”

She could hear their gales of laughter as she walked back to her SUV. She didn’t care. She felt pleasantly stimulated. A car pulled up behind hers. Madeline smiled, lifted her hand apologetically and hurried back to be in her car before the lights changed.

Her ankle turned. One second it was doing what an ankle was meant to do, and the next it was flipping out at a sickeningly wrong angle. She fell heavily on one side. Oh, calamity.

That was almost certainly the moment the story began.

With the ungainly flip of an ankle.

3.

Jane pulled up at a red light behind a big shiny SUV with its hazard lights blinking and watched a dark-haired woman hurry along the side of the road back to it. She wore a floaty, blue summer dress and high strappy heels, and she waved apologetically, charmingly at Jane. The morning sun caught one of the woman’s earrings, and it shone as if she’d been touched by something celestial.

A glittery girl. Older than Jane but definitely still glittery. All her life Jane had watched girls like that with scientific interest. Maybe a little awe. Maybe a little envy. They weren’t necessarily the prettiest, but they decorated themselves so affectionately, like Christmas trees, with dangling earrings, jangling bangles and delicate, pointless scarves. They touched your arm a lot when they spoke. Jane’s best friend at school had been a glittery girl. Jane had a weakness for them.

Then the woman fell, as if something had been pulled out from underneath her.

“Ouch,” said Jane, and she looked away fast to save the woman’s dignity.

“Did you hurt yourself, Mummy?” asked Ziggy from the backseat. He was always very worried about her hurting herself.

“No,” said Jane. “That lady over there hurt herself. She tripped.”

She waited for the woman to get up and get back in her car, but she was still on the ground. She’d tipped back her head to the sky, and her face had that compressed look of someone in great pain. The traffic light turned green, and a little blue Mitsubishi that had been in front of the SUV zoomed off with a squeal of tires.

Jane put her signal on to drive around the car. They were on their way to Ziggy’s orientation day at the new school, and she had no idea where she was going. She and Ziggy were both nervous and pretending not to be. She wanted to get there in plenty of time.

“Is the lady OK?” said Ziggy.

Jane felt that strange lurch she sometimes experienced when she got distracted by her life, and then something (it was often Ziggy) made her remember just in time the appropriate way for a nice, ordinary, well-mannered grown-up to behave.

If it weren’t for Ziggy she would have driven off. She would have been so focused on her goal of getting him to his kindergarten orientation that she would have left a woman sitting on the road, writhing in pain.

“I’ll just check on her,” said Jane, as if that were her intention all along. She flicked on her own hazard lights and opened the car door, aware as she did of a selfish sense of resistance. You are an inconvenience, glittery lady!

“Are you all right?” she called.

“I’m fine!” The woman tried to sit up straighter and whimpered, her hand on her ankle. “Ow. Shit. I’ve rolled my ankle, that’s all. I’m such an idiot. I got out of the car to go tell the girl in front of me to stop texting. Serves me right for behaving like a school prefect.”

Jane crouched down next to her. The woman had shoulder-length, well-cut dark hair and the faintest sprinkle of freckles across her nose. There was something aesthetically pleasing about those freckles, like a childhood memory of summer, and they were very nicely complemented by the fine lines around her eyes and the absurd swinging earrings.