Plum has finally managed to land a husband - and he even has a title! He also has a pack of five unruly children she's nicknamed the "diablitos." Yet keeping up with their scrapes is much easier than what Harry's asking her to do: rejoin Society after a decade away from the ton. Her first scandal nearly broke her. And if they find out her real secret - that she literally wrote the book on sex, called The Guide to Connubial Calisthenics - she's not the only one who will be ruined forever...