If the Duke Demands (Capturing the Carlisles #1)
Anna Harrington

Shocked to find Miranda in his bed, Sebastian quickly offers her a deal to avoid scandal: he'll help her win his brother's heart if she'll find him the perfect wife. But what begins as a simple negotiation soon spirals out of control. For the longer this reformed rake tries to make a match for Miranda, the more he wants to keep her all to himself.
The first book in Anna Harrington's new sexy Regency trilogy about the Carlisle brothers—three unrepentant rakes who become respectable gentlemen when family tragedy strikes.