“No, thanks.”

I put away the compact, thinking hard. I want to ask her why she hates mirrors. But I have to put it tactfully.

“Jess…” I say at last.

“Yes?”

“Why do you hate mirrors?”

The only sound is the whistling of the wind. At last Jess lifts her head.

“I dunno,” she says. “I suppose because every time I looked into a mirror when I was young, my dad told me not to be vain.”

“Vain?” I look at her, wide-eyed. “What, every time?”

“Most of the time.” She shrugs, then sees my face. “Why? What did yours say?”

“My parents used to say…” Now I’m a bit embarrassed. “They used to say I was the most beautiful little angel who had ever fallen down from heaven.”

“Well.” Jess hunches her shoulders as though to say “Go figure.”

“God, you’re right,” I say suddenly. “I’ve been spoiled. My parents have always given me everything. I’ve never had to stand on my own two feet. Ever. I’ve always had people there for me. Mum and Dad… then Suze… then Luke.”

“I had to stand on my feet right from the word go,” says Jess. Her face is in the torch’s shadow, and I can’t make out her expression.

“He sounds quite… tough, your dad,” I say tentatively.

“Dad never really expressed emotion,” she says at last. “Never really told you when he was proud. He felt it,” she adds vehemently. “But in our family we don’t go blabbing about everything, the way you do.”

A sudden gust of wind loosens up a corner of the tent, blowing in a flurry of rain. Jess grabs the flap and reaches for a metal pin.

“I’m the same,” she says, banging the metal pin into the ground with a rock. “Just because I don’t say things doesn’t mean I don’t feel them.” She looks round and meets my eyes with a visible effort. “Becky, when I came to visit your flat, I didn’t mean to be unfriendly. Or… cold.”

“I should never have called you that,” I say in a flood of remorse. “I’m really sorry—”

“No,” Jess interrupts. “I’m sorry. I could have made more effort. I could have joined in.” She puts the rock down on the ground and gazes at it for a few seconds. “To be honest, I was a bit… unnerved by you.”

“Luke said you might find me overwhelming,” I say ruefully, and rub my head, which has started to throb again.

“You should sleep,” Jess says, watching me. “It’s the best healer. And the best painkiller. Here’s a blanket.” She gives me a sheet of something that looks like tinfoil.

“Well… OK,” I say doubtfully. “I’ll try.”

I put my head down in the least uncomfortable place I can find, and close my eyes.

But I can’t sleep. Our conversation is going round and round in my mind, with the lashing rain and flapping of the tent as a sound track.

I’m spoiled. I’m a spoiled brat.

No wonder Luke got pissed off. No wonder our marriage is a catastrophe. It’s all my fault.

Oh God. Suddenly tears are rising in my eyes, which is making my head throb even more. And my neck’s all cricked… and there’s a stone in my back…

“Becky, are you OK?” says Jess.

“Not really,” I admit, my voice all thick and wobbly. “I can’t get to sleep.”

There’s no reply, and I think Jess can’t have heard, or doesn’t have anything to say. But a moment later I feel something next to me. I turn round, and she’s offering me a small white slab.

“It’s not peppermint creams,” she says flatly.

“Wh-What is it?” I falter.

“Kendal Mint Cake. Traditional climbing food.”

“Thank you,” I whisper, and take a bite. It has a weird, sweet taste, and I’m not that keen, but I take a second bite, to show willingness. Then, to my horror, I feel tears starting up again.

Jess sighs, and takes a bite of Kendal Mint Cake herself. “What’s wrong?”

“Luke will never love me again,” I sob.

“I doubt that.”

“It’s true!” My nose is running and I wipe it with my hand. “Ever since we got back from our trip, it’s been a disaster. And it’s all my fault, I’ve ruined everything—”

“It’s not all your fault,” interrupts Jess.

“What?” I gape at her.

“I wouldn’t say it was all your fault,” she says calmly. “It takes two.” She folds up the Kendal Mint Cake wrapper, then unzips her backpack and slips it in. “I mean, talk about obsessed. Luke’s totally obsessed by work!”

“I know he is. But I thought he’d changed. On our honeymoon he was totally laid-back. Everything was perfect. I was so happy.”

Into my mind slips a memory of Luke and me, all brown and carefree. Holding hands. Doing yoga together. Sitting on the terrace in Sri Lanka, planning our surprise return. I had such high hopes. And nothing worked out the way I thought it would.

“You can’t be on honeymoon forever,” points out Jess. “It was bound to be a bit of a crash.”

“But I was so looking forward to being married,” I say with a gulp. “I had this image: we were all going to be sitting round the big wooden table in candlelight. Me, Luke, Suze… Tarquin… everyone happy and laughing… ”

“And what happened?” Jess gives me a shrewd look. “What happened to Suze? Your mum told me she was your best friend.”

“She was. But while I was away she… found someone else.” I focus on the flapping blue canvas, feeling a lump in my throat. “Everyone’s got new friends and new jobs and they’re not interested anymore. I… haven’t got any friends.”

Jess zips up her backpack and pulls the drawstring tight. Then she looks up.

“You’ve got me.”

“You don’t even like me,” I say dolefully.

“Well, I’m your sister,” says Jess. “I’ve got to put up with you, haven’t I?”

I raise my head, and there’s a glimmer of humor in her eyes. And warmth. A warmth I don’t think I’ve ever seen before.

After a pause, I say, “You know, Luke wants me to be just like you.”

“Yep. Right.”

“It’s true! He wants me to be thrifty and frugal.” I put the rest of my Kendal Mint Cake down behind a rock, hoping Jess won’t notice. “Will you teach me?”

“Teach you. To be frugal.”

“Yes! Please.”

Jess rolls her eyes.

“For a start, if you’re going to be frugal, you won’t throw away a perfectly good piece of Kendal Mint Cake.”

“Oh. Right.” A bit shamefaced, I pick it up and take a bite. “Er… yummy!”

The wind is whistling with even more force, and the tent is flapping faster and faster. I pull Jess’s tinfoil blanket around me tighter, wishing for the millionth time I’d brought a cardigan. Or even a cagoule. Then all of a sudden I remember something. I reach into the pocket of my skirt — and I don’t believe it. The little lump is still there.

“Jess… this is for you,” I say, pulling it out. “I came to your house to give it to you.”

I hand Jess the little blue bag. Slowly she unties it and tips the silver Tiffany bean with its thin chain out onto her hand.

“It’s a necklace,” I explain. “I’ve got the same one — look.”

“Becky.” Jess looks stunned. “It’s… it’s really…”

For an awful moment I think she’s going to say unsuitable or inappropriate.

“Fab,” she says at last. “It’s fab. I love it. Thank you.”

She fastens the chain around her neck and I survey her with delight. It really suits her! What’s a bit weird, though, is that something about her face seems different. It’s kind of changed shape. Almost as if…

“Oh my God!” I exclaim in astonishment. “You’re smiling!”

“No, I’m not,” says Jess at once, and I can see her trying to stop — but she can’t. Her smile broadens, and she lifts a hand to finger the bean.

“Yes, you are!” I can’t help laughing. “You so are! I’ve found your weak point. You are a Tiffany girl at heart.”

“No, I’m not!”

“You are! I knew it! You know, Jess—”

But whatever I was about to say is drowned out by the howling wind, as, with no warning, the gale whips up one entire side of the tent.

“Oh my God!” I shriek, as drenching rain lands in my face. “Oh my God! The tent! Get it!”

“Shit!” Jess is hauling the flapping canvas down again and desperately trying to anchor it, but with another huge gust it blows right out of her grasp. It billows like a sailing ship, then disappears down the mountainside.

“What are we going to do now?” I have to shout just to be heard above the noise.

“Jesus Christ.” She rubs rain off her face. “OK. We have to find shelter. Can you get up?”

She helps me to my feet, and I can’t help crying out. My ankle is total agony.

“We’ll have to make for those rocks,” Jess says, gesturing through the rain. “Lean on me.”

The pair of us start half limping, half shuffling up the muddy slope, gradually getting into an odd kind of rhythm. I’m gritting my teeth against the pain, willing myself not to make a fuss.

“Will anyone come to rescue us?” I manage between steps.

“Unlikely. We haven’t been out long enough.” Jess pauses. “OK. You need to get up this steep bit. Hold on to me.”

Somehow I make it up the rocky incline, aware of Jess’s strong grip holding me up. God, she’s in good condition. She could easily have climbed down out of the rain, it occurs to me. She could be safe and warm at home now.

“Thanks for helping me,” I say gruffly, as we start on our shuffle again. “Thanks for staying with me.”

“ ’S OK,” she says, without missing a beat.

The rain is billowing into my face, almost choking me. My head is starting to whirl again, and my ankle is excruciating. But I have to keep going. I can’t let Jess down.

Suddenly I hear a noise through the rain. But I must be imagining it. Or it’s the wind. It can’t be real…

“Hang on.” Jess stiffens. “What’s that?”