Miss Pymbroke's Rules (Cats of Mayfair #2)
Rosemary Stevens

When Verity Pymbroke inadvertently rented her London house to Lord Carrisworth, she broke one of her most stringent rules *condoning the presence of a rake. Clearly, the man was a practiced scoundrel. The sensations he provoked in her were most unsettling, though not entirely unpleasant.
His Lordship couldn't resist this Miss with the face of an angel and a prim and proper nature that tempted him without reason. With one kiss he dared to find out if a passionate nature lay beneath her sensible gowns and strict rules of conduct.
But who was more surprised, himself or Miss Pymbroke? And how could he possibly convince a lady with too many rules to break several . . . all in the name of love?