I watched her walking away, thinking. How many times had I heard the expression, ‘Don’t get mad, get even’? Well, now, instead of thinking it, I was going to do it. Peter had no idea what hell he had unleashed for himself but he was going to pay for what he had done. Right at that moment, I wasn’t quite sure how, but I knew I was going to exact a revenge so terrible that he would be begging me for a reprieve.

Over the next few days, a plan began to form. I needed to get to Peter via a different route. I thought about causing problems for him at work, about concocting some kind of sexual assault or rape allegations that would have him shamed and fired from his oh-so-bloody-successful career. But there was the small matter of Marcus and probably quite a few other people at my company knowing that we had been openly having a relationship for months and I wasn’t sure I could convince anyone that I had been an unwilling participant.

No, it had to be something else. Something personal to do with his family, that would hurt him as much as he’d hurt me. I wracked my brains to remember the stories he had told me about them, cursing myself now for my huffy disinterest. Then, one night, as I was cleaning my teeth, a genius thought popped into my head, as I stared at my reflection in the bathroom mirror. I suddenly remembered that after Christmas, he told me that his son, Ben, had been dumped by his long-term girlfriend and had taken it very badly.

I remembered thinking that with any luck, Jo would do the same to Peter and then he’d be all mine. I opened my laptop and began to search. It took less than five minutes to find him through LinkedIn. He worked in advertising and his profile picture showed a handsome man who was a little older than me. He looked a bit like his father, which was a plus. But he also looked less arrogant than Peter, with a kinder face, probably because his jawline wasn’t quite so square and chiselled.

I found out that he worked near Covent Garden and waited for him to leave a couple of evenings, to see where he went. He seemed to favour a certain bar, which I checked out after he had gone and it was perfect.

On the night I decided to put my plan into practice, I took the afternoon off work, so that I had time to go home and get ready first. I knew I had one chance to get this right and I didn’t want anything to go wrong. I noticed him and his friend as soon as I walked in and waited at the bar until the table near them became free. The only problem was the number of men who approached, offering to buy me a drink. I adopted my steeliest expression and coldly rebuffed them, staring pointedly at Ben until finally, finally, his friend noticed me.