Quickly I start to jot some broad headings on a piece of paper. This is much more like it. Much better than randomly stuffing things into a case. This way, I won’t have any superfluous clothes, just the bare minimum.

Outfit 1: Sitting by pool (sunny).Outfit 2: Sitting by pool (cloudy).Outfit 3: Sitting by pool (bottom looks huge in morning).Outfit 4: Sitting by pool (someone else has same swimsuit).Outfit 5:

The phone rings in the hall, but I barely look up. I can hear Suze talking excitedly — then a moment later, she appears in the doorway, her face all pink and pleased.

“Guess what?” she says. “Guess what?”

“What?”

“Box Beautiful has sold out of my frames! They just phoned up to order some more!”

“Oh, Suze! That’s fantastic!” I shriek.

“I know!” She comes running over, and we have a big hug, and sort of dance about, before she realizes she’s holding a cigarette and is about to burn my hair.

The amazing thing is, Suze only started making photograph frames a few months ago — but already she’s supplying four shops in London, and they’re doing really well! She’s been in loads of magazines, and everything. Which isn’t surprising, because her frames are so cool. Her latest range is in purple tweed, and they come in these gorgeous gray sparkly boxes, all wrapped in bright turquoise tissue paper. (I helped choose the exact color, by the way.) She’s so successful, she doesn’t even make them all herself anymore, but sends off her designs to a little workshop in Kent, and they come back, all made up.

“So, have you finished working your wardrobe out?” she says, taking a drag on her cigarette.

“Yes,” I say, brandishing my sheet of paper at her. “I’ve got it all sorted out. Down to every last pair of socks.”

“Well done!”

“And the only thing I need to buy,” I add casually, “is a pair of lilac sandals.”

“Lilac sandals?”

“Mmm?” I look up innocently. “Yes. I need some. You know, just a nice cheap little pair to pull a couple of outfits together…”

“Oh right,” says Suze, and pauses, frowning slightly. “Bex… weren’t you talking about a pair of lilac sandals last week? Really expensive, from LK Bennett?”

“Was I?” I feel myself flush a little. “I… I don’t remember. Maybe. Anyway—”

“Bex.” Suze gives me a suddenly suspicious look. “Now tell me the truth. Do you really need a pair of lilac sandals? Or do you just want them?”

“No!” I say defensively. “I really need them! Look!”

I take out my clothes plan, unfold it, and show it to Suze. I have to say, I’m quite proud of it. It’s quite a complicated flow chart, all boxes and arrows and red asterisks.

“Wow!” says Suze. “Where did you learn how to do that?”

“At university,” I say modestly. I got my degree in Business and Accounting — and it’s amazing how often it comes in handy.

“What’s this box?” she asks, pointing at the page.

“That’s…” I squint at it, trying to remember. “I think that’s if we go out to some really smart restaurant and I’ve already worn my Whistles dress the night before.”

“And this one?”

“That’s if we go rock-climbing. And this”—I point to an empty box—“is where I need a pair of lilac sandals. If I don’t have them, then this outfit won’t work, and neither will this one… and the whole thing will disintegrate. I might as well not bother going.”

Suze is silent for a while, perusing my clothes plan while I bite my lip anxiously and cross my fingers behind my back.

I know this may seem a little unusual. I know most people don’t run every single purchase past their flatmate. But the fact is, a while ago I kind of made Suze a little promise, which was that I’d let her keep tabs on my shopping. You know. Just keep an eye on things.

Don’t get the wrong idea here. It’s not like I have a problem or anything. It’s just that a few months ago, I did get into a… Well. A very slight money scrape. It was really just a tiny blip — nothing to worry about. But Suze got really freaked out when she found out how much I owed, and said that for my own good, she’d vet all my spending from now on.

And she’s been as good as her word. She’s very strict, actually. Sometimes I’m really quite scared she might say no.

“I see what you mean,” she says at last. “You haven’t really got a choice, have you?”