I had my suspicions when TPR told me that he would pop back to our flat in the middle of the conference for a shower.

These strengthened when he asked where he would find my hair straighteners. This was a strange request from someone with a very short, close-cropped, haircut.

When he said that it would not be a good idea for me to follow him home, I asked him outright: ‘You’re having an affair, aren’t you?’

He nodded, unable to resist a triumphant smile.