Missing Pieces by Desiree Holt

Ten years ago, Jen LaCroix left Dino Brancuzzi carrying a big secret. Now, her life is in danger and he’s the only man she can trust.

When a valuable shipment disappears from the museum where she works, the finger points to her and the number of dangerous people after her continues to increase. Leaving that secret, Dino’s nine-year-old daughter, Deanne, with Ethan Caine, Jen finds a place to hide in the Caribbean.
Dino is stunned to discover he has a daughter and immediately launches a search to find Jen and protect her. He might have made the biggest mistake by not realizing in time that he loved her all those years ago, but can he forgive her for keeping the child a secret?