Wind Storm by Marlow Kelly

When Sinclair Quinn is jumped in a back alley, her assailants only want to know one thing, the whereabouts of Native American, Michael Papin, the man she’s been in love with since they were street kids together.
Nine months ago, Michael was hit by a car while trying to prevent a group of billionaires, known as the Syndicate, from framing Sinclair’s brother. Now they are back, and they want him dead. When the Syndicate attacks his family, Michael will do anything to ensure their safety, including hiding out with Sinclair.
Sinclair has devoted her life to rescuing stolen children and saving the victims of human trafficking. She knows who she is and is comfortable with the woman she’s become, although she’s never forgotten the man who broke her heart when she was eighteen. Going Underground with Michael and his family is not part of her plan. She trusts him with her life, but can she trust him with her heart?