But even if I found the perfect excuse I still couldn’t go. It was Friday morning and on Friday mornings Mum cleaned at The Cliff House in preparation for their possible arrival. Of course, she had no idea they were already there, that they’d arrived early and with a daughter she didn’t know they had.

I lay on my bed and watched her through my open door as she got dressed on the landing. She took her cleaning clothes out of the airing cupboard, her stone-washed denim jeans, white T-shirt, a grey sweatshirt over the top. For work she always tied her hair into a tight ponytail, high enough to be out of her way, and her earrings were simple gold hoops. She didn’t wear any make-up, just some briskly applied Oil of Ulay.

‘You okay?’ she asked with a warm smile as she caught me watching her.

I turned on my side on the pillow and nodded.

‘You look happy snuggled up there,’ she said. ‘I wish I could come and jump in with you. But’ —she sighed— ‘no rest for the char lady.’

I was desperate to share the fact they had a daughter. A girl with white-blonde hair who was called Edie after très glamoureux Edith Piaf. But I stayed quiet. If I told her, she’d ask questions and I might let slip I’d been taking the key and letting myself in, which I knew would send her mental.

She closed the front door and I listened to her footsteps ringing on the pavement until they faded to nothing. My immediate thought was to get out to the rock with my binoculars and watch her in the house with them, but it wasn’t worth the risk. She knew about the spot where Dad used to take me. He’d taken her there too. Even as a boy it had been his favourite place to watch the sun set over the sea and spy on the gulls and kittiwakes and choughs. The chances of her glancing in the direction of the point were significant and if she saw me I’d have to explain why I was there. So I tried to ignore the gnawing lure of the house by keeping myself busy. I cleaned the kitchen, washed-up and dried, changed the sheets on Granfer’s bed then sat with him a while, listening to him attempting to breathe whilst grumbling about the godforsaken government who murdered the tin mines and this being the hardest jigsaw he’d ever tried to do. Then I made him a cup of tea with two and a half sugars in which made him wink and flash me his gap-toothed smile.

When I finally heard the latch click and the front door open, I ran to the top of the stairs, desperate to hear about the house and the Davenports and Edie.

She was hanging her coat on the hook.

‘Hi,’ I said. ‘Good time?’

‘Cleaning?’ She raised her eyebrows and wiped her forehead with her hand. ‘It’s hot today. And I nearly missed the bus and had to run.’ She paused, stared up at me, her brow knotted. ‘The Davenports were there.’