'It got better, in time, though to be truthful it always felt more of a duty than a pleasure: a little like homework, satisfying when over, and done well, but never exactly enjoyable. But then nobody had ever suggested it could be otherwise.'

This was the view of Claudia Faraday, 1920s respectable wife and mother of three, on the subject of sex. That is until an unexpected turn of events shakes her out of her torpor and propels her back into the world revitalised and reawakened, where she discovers, as Marie Stopes might have said: Approached in the right way, even homework can be fun.