Mine to Keep by Jen Talty

All Brynleigh “Bryn” Tinsley wanted was to find a safe harbor and put the past behind her so she could raise her little girl in a peaceful, loving environment.
Now, three identities later and two thousand miles away, she finds herself in the small, seaside town of Lighthouse Cove, Florida.
The last thing she needs is a pesky firefighter who keeps showing up at every turn, doing his best to become her handyman—and more.
But when her daughter’s life is on the line, she’ll do whatever it takes to protect her from the hell that is her past.

Jamison Kirby can understand not wanting to speak to your family. He’s barely spoken to his mother or brothers in almost two years—much to his father’s dismay. So, he doesn’t think much of Bryn not wanting anything to do with her daughter’s extended family. However, he does take being lied to personally. So, when he finds out that Bryn isn’t even her real name, he goes digging into her past. And doesn’t like what he finds.
Worse, he pokes a hornet’s nest, putting Bryn and her daughter in the line of fire, and forcing Jamison to do the one thing he swore he’d never do.

Call his cop mother and brothers for help.