Reckless Sin by Darlene Rodriguez

Karina Vasiliev had it all—until someone tried to abduct her, putting her father on high alert and forcing her to move back home to Boston. She knew her father had hired protection. What she hadn’t expected was the infuriatingly sexy Nathan James.
No one says no to the Vasiliev family—which is how Nathan gets stuck babysitting the wealthy hotelier’s daughter.
Being a bodyguard to the world’s elite requires unwavering focus and dedication. And that leaves no room for the temptation that comes with looking after the fiery Russian heiress.
But when boundaries are tested and emotions are on the line, Nathan must make a decision.
Can he keep Karina safe? Or will their forbidden attraction put her life in jeopardy?