Bared to You by Sylvia Day (2012)

Eva moves to New York City with her bisexual best friend and model Cary and

starts a job in an ad agency. On the first day she bumps into extremely rich and handsome Gideon Cross. There is instant attraction on both sides, and though Eva rebuffs him for a while, of course they end up together. Both have painful pasts, which actually does make them good for each other. Basic hot fluff.