Once Upon a SEAL (Lucky Thirteen #5)
S.M. Butler

Bastian’s scars are deeper than the surface. They’re embedded into his soul, and he’s content to keep them buried. But the second Maddie ends up on his doorstep with her sparkling smile and her sunshine hair, his quiet new life shatters and she just might be able to excise the demons he’s tried hard to keep tucked away—if he lets her in.
When Bastian’s old life comes haunting them, he knows he should let her go. But the light she shines on his soul keeps the darkness within him at bay. Letting her go may take more strength than he has, and keeping her close could get her killed.