In Too Deep by Shannyn Schroeder

Love can heal…or devastate. Trouble is, the difference isn’t clear until you’re In Too Deep to escape…

Ronan Doyle needs the truth. He can’t let his family declare their missing father dead when there are still so many unanswered questions. He’s sure the Cahills have answers. After all, they’re part of almost every dirty deal in Chicago. So, he’ll get what he needs—even if means working for the enemy. But there was one thing he wasn’t ready for. Her…
Chloe McCarthy can’t believe Ronan is back home. She’d had such a crush on him in high school. Too bad he never saw past her good girl reputation. But that all might change very soon. Her job gives her access to information Ronan needs, and that gives her access to what she needs. Ronan…
It was supposed to be a simple arrangement. He’d get information, she’d get a sexy, friend-with-benefits. But Ronan and Chloe are about to find out there’s no such thing as simple when hearts are on the line.