The Red Diary by Toni Blake
Life hasn't turned out the way Nick Armstrong expected and he blames Henry Ash. Because of Henry, Nick's family has had to struggle for everything while Lauren, Henry's precious daughter, has had the world at her feet. So when Nick is hired to paint Lauren's house, he can't resist peeking into her life. But he never, expected to peek into her innermost desires. After Nick finds her red diary, detailing her every delicious fantasy, he can't resist seducing her to break her heart. What begins as a purely physical relationship soon turns into something hotter than passion-love. But can Lauren ever forgive him for trespassing into her secret desires?