Shadow Target by Misty Evans

The storm outside isn’t half as dangerous as the one between them.

Former Marine Scout Sniper, Mack “Hawk” Callan, has exactly one rule: never trust Alyssa Bennett again. But when she stumbles into his undercover operation and compromises a major FBI investigation, he has no choice.
Two years ago, Alyssa Bennett chose her brother’s lies over Mack’s truth, shattering their future together. Now she’s witnessed a cartel summit, and the only way Mack can extract her is to claim she’s his girlfriend.
One kiss. One lie. One chance to get her out alive. But a Montana blizzard traps them in an isolated cabin, and suddenly keeping up the charade becomes keeping her alive.
As the storm rages and killers close in, Mack realizes the biggest threat isn’t the cold or the cartels—it’s the way Alyssa still fits perfectly in his arms.

Trust broke them. Survival will test them. And the choice between love and loyalty might cost them everything.