A couple of days after our threesome, John called and asked if I was up for another ‘session’ on Friday evening. Friday was our boys' night, and Sarah usually went to a bridge club. Something I’d mocked her for being way too middle class, but it was mostly an excuse for her to get drunk with the other wives in the village. Again, they wanted to come to my place, as Sarah was still anxious about using theirs. John had aske...

I’ve known Sarah and John since we were all at University together. I was their best man when they got married in their late 20s, and I was Godfather to one of their two kids. I’d moved to the other side of the country for a job a couple of years after graduation, but I remained close friends with them and kept in touch via email and the occasional phone call. I’d always meet up with them and their kids for a Sunday lunch...

John and I met up on the following Wednesday after our second threesome with his wife, Sarah. We’d originally planned to go and see the latest Hollywood blockbuster at the local cinema, but John called and asked if he could just come round for a drink and a takeaway. He sounded nervous and excited, if that makes sense. He arrived around 6 pm; we ordered from the local Chinese restaurant and opened some beers. In person, J...