Rescued by the forbidden rake / Mary Brendan.

Beholden to an irresistible rogue... When her half-sister goes missing, respectable Faye Shawcross is at her wits' end! Convinced her impulsive younger sister has got herself mired in potential scandal, Faye is unsure where to turn for help - certainly not to her upstanding fiance! The last person she expects to come to her rescue is the very man she's condemned as a rogue: Ryan Kavanagh, the dishonourable and disconcertingly alluring Viscount! This magnetic Irishman knows he raises Faye's passions, however reluctantly. He can nip her impending family scandal in the bud, but for a price - he wants Faye as his mistress...