Wicked Pleasures by Penny Vincenzi
All families have secrets. This family hid a secret which would tear it apart. Sexy, glamorous and fun, WICKED PLEASURES is the story of a brother and two sisters who find out that they all have different fathers: none of them Alexander, Earl of Catherham, who was married to their mother for almost twenty years. It is the story of the power and the greed of the mega-rich, as the great family banking business upon which fortunes are won and lost comes to the brink of ruin, and family ties are tested to the utmost.