Secured By The Seal by Carol Ericson

Revenge is personal – especially for one navy SEAL.

To find her sister, therapist Britt Jansen goes deep undercover at the core of a Russian mob. Navy SEAL sniper Alexei Ivanov is also infiltrating the club – but while Britt is driven by desperation to find her family, Alexei's motivation is stone–cold vengeance. Teaming up yields more than either of them expected – the horrific truth behind the club's backroom business, and an attraction that could rip them apart.