Tantalizing Secrets - Secrets, #3

Secrets Trilogy, Book 3A murder... A lord's desire...and her quiet, respectable life is gone forever. Arabella Mason is too busy investigating her brother-in-law's "accidental" death to entertain thoughts of love. She'll go to any lengths to ease her sister's grief, even accept the help of the distressingly attractive Viscount Bredon, Peter Worsley. Instead of answers, the trail of clues only leads to more questions.
Who was her brother-in-law, really...and why does Peter, who poses as her brother in public, make mincemeat of her resistance in private? A successful politician and confirmed bachelor, Peter has bedded the loveliest women in society. He never imagined he'd wind up in a Leicester backwater, helping a pretty widow investigate his brother's untimely death. As his suspicions of foul play grow stronger, the danger rises-and so does his desire for Arabella.
One kiss, and she snatches away all his resolve, leaving him wondering which he wants more... To find his brother's killer? Or keep Arabella safe-and make her his?