In the Line of Fire — Dixie Lynn Dwyer

Corporal is in love with Berlin, but her life is in danger. The only way to keep her safe is to send her to his four cousins, retired soldiers who can watch over her and protect her. He hasn't spoken to his cousins in five years, after a failed menage relationship in which the woman they loved cheated on them and then overdosed on drugs. It was too much for them to handle, and Corporal ran away from the pain. When he meets Berlin, the instant attraction makes him think about his cousins and what they all shared before. His hope is that his cousins fall in love with her, too. But men are trying to kill Berlin, and he has to stop them from following her, even if it means dying.

There's corruption and enemies everywhere, and to make it out alive will take some true friends from the past, his cousins' connections, and a bit of faith--not only to save Berlin's life, but also to mend their broken hearts and find true love after all.

Note: This book contains double penetration.
Note: This book contains triple penetration.