Absolution by Penelope Marshall

Cole Almen is home from the war, but he suffered a terrible loss…
Cole, a Navy SEAL, has returned home after losing his best friend Ezra right before his eyes. To make matters worse, Cole’s roommates are his girlfriend, Catherine, and Ezra’s fiancée, Adeline.

Adeline Chevallier blames Cole for her fiancé’s death, and so does Catherine…
Adeline is devastated when she learns of Ezra’s death, and holds Cole responsible, which makes them so uncomfortable they can hardly look at each other. At first, Catherine appears to be the only thing keeping the house from falling apart, but without warning, her behavior changes, forcing Cole to kick her out. Finally alone, Adeline and Cole form an unexpected bond.

Cole and Adeline are so caught up in these new emotions that they forget about Catherine—and her secrets…
Catherine is keeping big secrets which could destroy everything Cole and Adeline have built. When she finally reveals what she’s been hiding, her dangerous inner demons take over. When Cole returns to war, Adeline feels betrayed by everyone she holds dear, and does her best to move on.

Cole is miserable during his deployment. When he comes home from duty, he is determined to be with Adeline, but doesn’t even know how to find her.
Cole is trained to save people, but can’t seem to save the people he treasures most. With his life in turmoil, he’s running out of time to turn things around…
And Adeline might just be his last chance at Absolution.