Simple Faith by Susan Fanetti

Against his father’s wishes, Trey Pagano made a choice to join the other side of his family and stand with Don Nick Pagano, head of the Pagano Brothers, the most powerful Family in New England. Now he strives to find the balance between these two sides of himself, between the father who raised him and the don who means to lift him up.
Seeking the brightest mind to keep his secrets, Don Pagano recruited Lara Dumas, a woman with a brilliant
intellect bound up in a damaged mind and frail body. Lara has carefully constructed a small world for herself in a comfortable corner of Providence, building boundaries within her limits.
When Lara is hurt by Pagano Brothers’ enemies, the safety of her world is destroyed. The don assigns Trey to take her away and protect her—and the things she knows.
Hundreds of miles from home, hidden from danger and cut off from everything they know and trust, Trey and Laura grow close. Against his better judgment, Trey falls for the woman whose strength shines through the cracks in her psyche. Despite her trauma, Lara comes to trust the man who’s kept her safe.
Whether the bond they forge in safety can survive when they return to the world is a matter of faith—in themselves and in each other.