Relentless Hearts by Em Petrova

She’s in more danger than she realizes. And the only man who can keep her safe is the one determined to keep his distance.
Willow Malone has spent her life holding the ranch—and her family—together with common sense and pots of coffee. From wrangling her brothers’ security business to running horse therapy for the veterans program, she’s the one everyone counts on. But while she’s keeping everyone else’s world in order, her own heart has been running on empty.
Then the gifts start appearing—small, unsettling tokens that Willow brushes off as nothing. But her brothers see danger in every shadow, digging into the past of every man who’s ever looked her way. What she doesn’t see coming? The one man she thought would keep his distance stepping forward…insisting on becoming her bodyguard.
Retired Navy SEAL Decker “Dutch” Jansen came to Black Heart Ranch’s therapy program to heal from the scars no one else can see. Willow Malone—the fiery woman who’s become more than a friend, more than he dares admit—has a hold on him he can’t shake. He tells himself he’s too broken to deserve her light, but staying away has never been an option. And when the gifts become a bigger problem, Decker makes a vow to protect Willow with everything he has, even if it means facing the ghosts that haunt him.
One wrong move could cost him more than his heart—it could take his soul with it. But the real battle? Resisting the need to finally claim the woman he’s been burning for since the day they met.