Forsaken Hearts by Em Petrova

He’s hiding from his past. She’s protecting her future. When danger comes for her, the only thing stronger than the threat…is what they feel.
Former Navy SEAL Vander Pope came to Black Heart Ranch to rebuild his life after one failed mission destroyed everything he trusted about himself. Now he’s become too close to a stunning waitress he can’t stop watching from across the bar—a woman who makes him forget all the reasons he should keep his distance. She’s a line he can’t quit crossing, and though he knows he should walk away, it’s the one thing he can’t seem to do.
Summer Denton has spent years making sure she and her son never have to depend on anyone but each other. Trusting Vander Pope was never part of the plan, especially when the former SEAL keeps parts of himself locked away and kisses her like he’s already claimed a place in her life. The closer he gets, the harder it becomes to remember why she wanted him at a distance in the first place.
When Summer becomes the focus of a dangerous obsession, Pope takes his place as her bodyguard, leaving him nowhere to hide from his past—or the feelings growing between them. Forced together, the lines they swore not to cross disappear fast, and what was supposed to be temporary becomes something neither of them is willing to walk away from. Because it doesn’t matter where the danger started or who it was meant for. If it comes for her, it goes through him.