Dark Hearted Hero by Lena Cove

Ronan Black is done with love. The former Navy SEAL has built a quiet life far from the past that broke him, relying on routine, control, and emotional distance to keep everything intact. Getting involved is not an option, especially with someone tied to his past.
Isla Hart is starting over in a small town, determined to build a life that finally belongs to her. She’s a romantic who believes some risks are worth taking, even when the man in question is her brother’s guarded, off-limits former teammate.

He’s sworn off love. She believes in it with her whole heart. When opposites collide, lines blur, walls crack, and walking away becomes his hardest mission of all.

Content warning for: DV – mostly off-page, but the character does make an appearance