Future Under Fire by Trish McCallan

Sarah Gillespie is in Hell.
Two years of living under the thumb of a sociopathic killer will do that to a woman. But her sacrifices are worth it, if they save the lives of the two people she loves most in the world—her brother, Sean, and Navy SEAL Brett Taggart. But when her world explodes, exposing all her lies and hard choices, the consequences are horrific. And the resulting fallout sweeps up the two men she’s sacrificed everything to protect.

Brett (Tag) Taggart’s last two years have been hell.
The woman he’d expected to spend his life with ditches him to return to her hinky ex—a fellow special operator who raises one red flag after another. The teammates he depends on to watch his six turn on him in their stampede to take sides in Sarah’s Navy SEAL love triangle. And the wedding of the woman he loves—to a f@cking psychopath—is marching closer every day. But when Sarah is kidnapped minutes before walking down the aisle, it’s all hands on deck to rescue her.

The resulting disclosure of her secrets and lies leaves Tag reeling, unable to forgive or forget her choices. But when their positions are suddenly reversed and Sarah is taken, he’ll do anything—sacrifice everything—to get her back.
And suddenly the world isn’t so black and white anymore.