With a heavy heart, I threw my iPhone into the bin furthest from the flat before looping back on myself. I’d restored factory settings before I left the house, but I couldn’t be sure the PetCam app had truly been deleted. I knew some data could remain, but I thought it would be on the hardware not on the SIM. It was the only way to be sure. On my way back, I stopped off at Carphone Warehouse on the high street and purchased the cheapest android smartphone they sold. I put my old SIM back in and hoped I’d get the hang of how to use it quickly. I walked back from the shop, playing with the new device. Checking my texts, photos and browsing history for anything untoward. I was hoping there wouldn’t be a desire to look too hard.

When I returned home, Ben was still snoring, and I lay on my bed, hopeful for a few more hours sleep. All my emotions put away in the box marked ‘for later’ in my head. I had nothing to lose. I was going to even the scales of justice, or I would die trying.

Around midday there was a knock at the front door. Ben still hadn’t emerged, so I answered it. I hadn’t showered since my run and looked a mess. Amy stood in the doorway beaming, clutching a dry-cleaning bag, her face falling instantly when she saw it was me.

‘Is Ben in? His phone is switched off,’ she said curtly.

‘I believe so,’ I replied, moving to let her pass.

She knocked quietly on his bedroom door before letting herself in and closing it behind her. I hung around in the kitchen and made myself a sandwich, praying he wasn’t inside telling her what we’d been up to last night. After around ten minutes of pacing, they both came out. Ben looked dishevelled, Amy complaining how much he stunk of booze as she entered the kitchen and flicked on the kettle.

‘You need a coffee. We’ve got that wedding in a few hours and you need to get ready,’ she said brightly, tipping granules into a mug.

Ben and I exchanged a look as her back was turned. His eyes wide and panicked, like a deer caught in headlights just before it hits the windscreen. I sighed inwardly, relieved he hadn’t said anything but also disappointed too. His eyes searched mine. I had to give him an out. Let him off the hook. I smiled and gave the tiniest shake of my head, trying to convey the message that it was okay, I understood. Then I retreated to my room. I had no time to waste feeling nostalgic. I had to focus on the evening ahead. I knew what had to be done and I had to follow through.