Sapphire Ice by Hallee Bridgeman

To ROBIN BARTLETT, men were nothing more than violent users.
After a hair-raising childhood, Robin and her two younger half sisters battled simply to survive. Determined to give her sisters a very different life from that of their mother; to never have to rely on a man for anything, she worked two jobs and put them both through college, while accepting help from no one. Her heart had turned to ice and she had no use for men or God.

ANTONIO "TONY" VISCOLLI had grown up on the streets, homeless. At seventeen, he entered a downtown church with the intent of casing it, but found himself on his knees at the altar. Lovingly fostered by the youth minister, Tony learned about God. Striking out on his own, he let God lead him to eventually become a very successful businessman. In a fallen world, Tony was a gem.

When he bought the restaurant where Robin bartended, she immediately resented his intrusion into her well ordered, but exhausting, life. She suspected his special attention and constant kindness came with expectations of something from her in return, something she wasn't willing to give.
Tony knew God had led him to Robin. Would she ever allow herself to trust him? Could she ever allow herself to trust God? Or would the winter of their tragic youths rise from the shadows of the past and freeze any chance at happiness?