I turn to Becky, who’s halfway through what she’d later explain was a test fajita, a dollop of sour cream on her chin. She wipes it off, and tries to talk with her mouth full, so it comes out a bit muffled.

‘Everyone except Rob.’

I watch Emma, who has helped herself to another drink, but she’s added a mixer this time and she’s actually drinking it, not downing it in one. She’s sitting on the edge of the table, her long legs stretched out and crossed at the ankles. ‘Ah, yes. The mysterious Rob,’ she says, arching an eyebrow and smiling. She reaches over and takes a handful of tortilla chips. ‘Have you met him, Jess? I’m beginning to think maybe he’s a figment of Becky’s imagination.’

‘Yeah, Becky,’ says Alex. He shoves the bottle on the wonky wooden shelf over the kitchen sink and grabs a plate, turning to look at her, jokingly. ‘What’s the story with Rob?’

‘He is real, I promise you.’ Becky shakes her head, laughing.

‘Of course. Man of few words and many knives.’ Emma points to the kitchen counter. ‘Where are they, Becky? They were there the other day when I had breakfast then they disappeared.’

But Becky has her head in the freezer, trying to find a bag of ice, and doesn’t reply.

I take a look at Emma while she’s occupied with assembling a fajita wrap. She’s properly beautiful. She has a very attractive, angular face, with an aquiline nose and huge doe eyes. She looks like she’s made to swan about in Notting Hill, hanging out in expensive restaurants, being treated to expensive lunches. I pull up a chair at the big table and have a moment of feeling scruffy, freckled, and very suburban. Almost like someone who’s been living with their grandparents and working in an office in a seaside town a million miles from London, which isn’t surprising.

‘So what we know is this: Rob’s a chef, which means he works really long hours and we never see him because he’s home when we’re all out at work, and then out when we get back,’ Emma begins. ‘He turned up the other day, dumped all this expensive-looking kitchen kit on the table, then looked at his watch and said he had to run.’

‘Then I put his stuff in the big larder cupboard,’ Becky continues, banging a bag of ice against the edge of the table until the cubes separate. ‘Because three blocks of intimidating kitchen knives sitting out on the work surface was going to give me nightmares and I had visions of a serial killer turning up and murdering us all in our beds.’

‘I think a serial killer would probably have their own kit, don’t you?’ Alex says, looking thoughtful.

The three of them look at each other and laugh and I do too, but a split second behind. It’s weird – like being back at school or when you start a new job and you have that new-girl feeling when you’ve missed the boat a little bit. I watch as Alex, Emma and Becky make themselves fajitas from the food laid out on the table.