The kitchen is just as amazing. It has a vast breakfast bar, a glass roof, and about every gadget known to mankind. I’m trying as hard as I can not to look overawed as Fabia runs through the appliances. “Triple oven…chef’s hob…This is a rotating multisurface chopping area….”

“Not bad.” I run a hand over the granite with a jaded air. “Do you have a built-in electric sushi maker?”

“Yes,” she says as though I’ve asked something really obvious.

It has a built-in electric sushi maker!

Oh God, it’s just spectacular. And so is the terrace with built-in summer kitchen and barbecue. And the drawing room fitted out with David Linley shelves. As we follow Fabia upstairs to the main bedroom I’m practically expiring, trying not to exclaim at everything.

“Here’s the dressing room….” Fabia shows us into a smallroom lined with paneled walnut wardrobes. “This is my customized shoe cupboard….” She opens the door and we walk in.

I feel faint. Either side of us are rows and rows of shoes, lined up immaculately on suede-lined shelves. Louboutins…Blahniks…

“It’s amazing!” I blurt out. “And look, we’re the same size and everything. This is so meant to be—” Luke casts me a warning glance. “I mean…yeah.” I give an offhand shrug. “It’s OK, I guess.”

“Have you got kids?” Fabia glances at my stomach as we move away.

“We’re expecting one in December.”

“We’ve got two at boarding school.” She rips a Nicorette patch off her arm, frowns at it, and drops it in a bin. Then she reaches in her jeans pocket and produces a packet of Marlboro Lights. “They’re on the top floor now but their nurseries are still done up if you’re interested.” She flicks a lighter and takes a puff.

“Nurseries?” echoes Luke, glancing at me. “More than one?”

“His and hers. We had one of each. Never got round to redecorating. This is my son’s….” She pushes open a white-paneled door.

I stand there, open-mouthed. It’s like fairyland. The walls are painted with a mural of green hills and blue sky and woods and teddy bears having a picnic. In one corner is a painted crib in the shape of a castle; in the other is a real little red wooden train on tracks, big enough to sit on, with a toy in each carriage.

I feel an overwhelming stab of desire. I want a boy. I so want a little boy.

“And my daughter’s is over here,” Fabia continues.

I can barely tear myself away from the boy’s nursery, but I follow her across the landing as she opens the door — and can’t help gasping.

I have never seen anything so beautiful. It’s a little girl’s dream. The walls are decorated with hand-painted fairies, the white curtains are looped back with huge lilac taffeta bows, and the little cradle is festooned with broderie anglaise frills like a princess’s bed.

Oh God. Now I want a girl.

I want both. Can’t I have both?

“So, what do you think?” Fabia turns to me.

There’s silence on the landing. I can’t speak for longing. I want these nurseries more than I have ever wanted anything, ever. I want this whole house. I want to live here and have our first Christmas here as a family, and decorate a huge pine tree in the black-and-white hall, and hang a tiny stocking above the fireplace….

“Pretty nice,” I manage at last, with a small shrug. “I suppose.”

“Well,” Fabia draws on her cigarette. “Let’s show you the rest.”

I feel like I’m floating as we progress through all the other rooms. We’ve found our house. We’ve found it.

“Make her an offer!” I whisper to Luke as we’re peering into the hot water cupboard. “Tell her we want it!”

“Becky, slow down.” He gives a little laugh. “That’s not the way to negotiate. We haven’t even seen it all yet.”

But I can tell he loves it too. His eyes are bright, and as we come down to the hall again he’s asking questions about the neighbors.

“Well…thanks,” he says at last, shaking Fabia’s hand. “We’ll be in touch through the estate agent.”

How can he restrain himself? Why isn’t he getting out his checkbook?

“Thank you very much,” I add, and am about to shake Fabia’s hand myself when there’s the sound of a key at the front door. A tanned man in his fifties comes in, wearing jeans and a leather jacket and carrying a cool art-portfolio — type thing.

“Hi, there.” He looks from face to face, clearly wondering if he’s supposed to know us. “How are you?”