I ducked my head, hoping he couldn’t see my flushed cheeks in the shadow of the hallway. ‘I was going for trustworthy,’ I said, picking a non-existent piece of fluff off my olive shirt-dress.

‘I’d trust you with my life.’ His mouth smiled but when I glanced up his eyes conveyed a look that was far from flippant. For a long moment, the air between us crackled like the promise of a summer storm.

‘Come on, what are you doing standing here ogling each other?’ Joan yelled, backpack in one hand, jumper flying from the other as she shot past us and out the front door.

Good question. This was Joan’s day. She needed an adult who was paying full attention to the task in hand, not swooning into a pile of mush because a friend had paid her a compliment. I grabbed my bag and followed her out the door.

After a short detour to drop Nesbit off with Yasmin, we headed for the M1. Sam was driving his pick-up truck for the simple reason that he refused to squeeze into my tiny Fiat. Spread out in the passenger seat, his stereo playing the sort of feel-good classics I would have predicted to find on Sam’s playlist, the air conditioning set to cool, calm and collected, I wasn’t complaining.

It was nearly three hours later, thanks to Joan’s nervous toilet stops, that we pulled off the M53 into Chester. Sam turned the music off, tension rising through the silence as we collectively held our breaths while Sam followed the satnav along an A road and into a small housing estate made up of well-proportioned 1950s semis with well-tended gardens and an air of middle-class respectability.

‘That one,’ Sam said, once we’d turned in to a cul-de-sac. He nodded at a house up ahead. We crept to a stop about three houses away, and he turned off the engine.

We sat there for a long moment, staring at the white frontage, the curtains in the windows and neat lawn as if it could reveal all we needed to know about the people residing within.

‘It looks nice,’ Joan said, with a tiny tremble.

‘It does,’ Sam agreed. ‘No old mattress in the garden, or barbed wire to keep out trespassers. So far, so good.’

After falling back into another prolonged silence, I realised that Sam was waiting for me to act. The problem was, after endless hours thinking about this moment, now we were here I wasn’t sure what to do.

‘Two cars in the drive, so there’s a good chance someone is home,’ I said, my voice about an octave higher than usual.

‘Yep,’ Sam replied, nodding encouragingly.