A Scandalous Portrait. The Rose Room Rogues, #1

In Victorian England, an Earl and his two brothers own and run a successful gambling hell, The Rose Room. Unbeknownst to most of London, they also accept assignments for matters sensitive to the Crown. The Earl of Huntington (Hunt) is a silent partner in a successful gambling hell run by his two brothers. A well-respected member of the ton, he moves about in Society as an unknown agent for the Crown on its most sensitive matters. Lady Diana is a long-time friend of Hunt's with the ability to embroil herself in difficult matters that require his assistance.
Once again she needs his help, but this situation could be a major scandal if discovered. Against his better judgment, Hunt agrees to her scheme, but this time the circumstances cause him to see the woman he'd always considered just a friend in a different way. The strong attraction he feels must be squelched since she would never do as his Countess. Scandal follows her every move.