His Countess for a Week by Sarah Mallory

Pretend marriage to the earl. Sharing everything — except a bed…

To uncover a ruthless killer, Arabella Roffey masquerades as the Countess of Westray, not expecting her ‘husband’ to suddenly appear! He could expose her but instead agrees to continue her ruse for a week. Randolph is brooding, handsome, and Bella likes him more than she should. As she pretends to be his wife, they share everything except a bed — but the temptation to do so is becoming all too real…