When Robin Rinaldi revealed the intimate details of her 5:2 marriage she drew gasps from married couples and staunch monogamists.

For the author of The Wild Oats Project described how, for a year, she would spend weekdays sleeping with strangers and weekends with her husband of 17 years, Scott Mansfield.

At the time, the dramatic move was a bid to save their relationship after Scott had a vasectomy, but now he's spoken out to say that he never wanted to see other people.

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