A sly grin spread across TPR’s face. Keen to learn the source of his amusement, I leant over the kitchen table and snatched the iPad from his hands. My heart sank when I saw the x-rated message on the screen. There was no denying it: my husband was having an affair with a woman called Theresa.

Now outed, TPR felt duty-bound to confess to all his misdemeanours. These stretched back over several years. While I had been chained to my computer in the study, I had no idea that he’d been visiting a string of women under the cover of ‘going for a bike ride/run’.

The secret of his success with the ladies, he claimed, was his ripped body and strict adherence to the ‘sex diet’.