Fugitive's Secret Child by Geri Krotow

This secret agent is back from the dead!

Presumed a casualty of war, ex–SEAL turned undercover operative Rob Bristol is on the hunt for a ruthless Russian mafia leader. But when beautiful U.S. Marshal Trina Lopez captures him, he discovers there's more at stake than their passionate past: they share a son! And to defeat a killer desperate to silence their family, Rob must risk it all.