Too Close to Resist (Harlequin Super Romance Series #1927)

Forced proximity, natural attraction 

Moving in with her brother isn't what free-spirited Grace McKnight imagined doing at age thirty. But under the circumstances, it's for the best. The complicating factor? Kyle Clark, her brother's business partner—aka the most infuriatingly buttoned-up person Grace has ever met. 

Living with Kyle causes as much friction as Grace expected. And plenty she didn't. She and Kyle have more in common than she thought. Now, instead of pressing his buttons, she'd rather undo them. Only, getting closer to Kyle means discovering his darkest secrets, and convincing him—and herself—those secrets won't tear them apart.