“Hi!” she says, putting down her backpack. “Hi, Auntie Jane. Becky, how are you?”

“I’m fine!” I can’t stop goggling at her. “You look great! You’re so tanned!”

“Oh.” Jess glances down at herself with zero interest, then reaches in her backpack. “I brought some maize biscuits. They’re made by a local cooperative in northern Guatemala.” She hands Mum a box made out of rough cardboard, and Mum turns it in her fingers, perplexed.

“Lovely, dear,” she says at last, and puts it down next to the teapot. “Have a fondant fancy!”

“Wow.” Jess sits down on the ottoman. “Look at Clem—” She stops as I mouth “Wilfie!” behind Suze’s back.

“Sorry?” says Suze.

“I was just going to ask…where’s Clementine?” Jess amends. “And I can’t believe Wilfie! He’s huge!”

I give her a tiny grin over my cup of tea as Suze replies. God, who would have thought it? My sister and my best friend, chatting away together.

There was a time when I thought I’d lost both of them for good. Jess, because we had a great big row, and called each other names which make me wince even now to remember them. And Suze because she made a new friend called Lulu, who rides horses and has four children and thinks she’s superior to everyone. I still can’t understand why Suze likes her; in fact, it’s the one subject we don’t see eye-to-eye on.

“I’ve got something for you too, Becky.” Jess delves into her backpack and produces a bunch of grubby rags. Janice recoils with a little cry of dismay.

“What’s that, dear?”

“Becky and I are going to make baby wipes,” says Jess.

“Make baby wipes?” Mum looks uncomprehending. “But love, Boots do them. You can get them in the three-for-two.”

“They look a little…used,” ventures Janice.

“We just need to boil them and soak them in a solution of oil and soap,” Jess informs her. “It’s far kinder to the environment. And to the baby’s skin. And they’re reusable. You’ll save pounds in the long run.”

“Er…fab.” I gulp, and finger the rags, one of which has HM WANDSWORTH PRISON printed faintly down the side. There is no way on earth I’m having a bucket of grotty old rags in my baby’s nursery. But Jess seems so enthusiastic. I don’t want to hurt her feelings.

“I’ll help you make a baby carrier too,” she says. “Out of a pair of Luke’s old jeans. It’s really simple.”

“Good idea!” I manage. I daren’t look at Luke.

“And I’ve had another idea.” Jess swivels on the ottoman to face me. “You don’t have to say yes, but maybe you could think about it?”

“Right,” I say nervously. “What is it?”

“Would you give a talk?”

“A talk?” I’m taken aback. “On what?”

“On how you kicked your spending addiction.” Jess leans forward, her face all warm and sisterly. “I have a friend who’s a counselor and I was telling her about you and how much you’ve changed. She said she thought you’d be an inspiration to a lot of the addicts in her group.”

There’s silence in the room. I can feel my face going puce.

“Go on, Bex.” Suze nudges my foot. “You’d be great!”

“I’ll come,” says Luke. “When is it?”

“It wouldn’t need to be formal,” says Jess. “Just a friendly chat about resisting consumer pressure. Especially now that you’re pregnant.” She shakes her head. “It’s ridiculous, the amount of rubbish people feel compelled to buy for their children.”

“I blame the catalogs,” says Luke gravely.

“So, what do you think, Becky?” persists Jess.

“I don’t really…” I clear my throat feebly. “I’m not sure…”

“Don’t be embarrassed!” Jess gets up from the ottoman and comes to sit beside me on the sofa. “I’m really proud of you, Becky. And you should be proud of yourself—” Her expression changes and she shifts on the sofa. “What am I sitting on? What’s this?” She reaches behind her and pulls out two glossy catalogs, with all the corners folded down.

Shit. And she would have picked out Luxury Baby, which has a cover picture of a baby dressed in Ralph Lauren, holding a Dior bottle and sitting in a miniature Rolls-Royce.

“Becky wasn’t looking at those,” says Suze in a rush. “They’re not even hers. They’re mine. I brought them.”