Gilbert Morris 
Virtuous Woman (House of Winslow Book #34) 

When Phil and Cara Winslow learn that the daughter they thought had died in infancy is still alive, their life of status and ease is turned upside down. With the help of a private detective, they find the girl, now twenty years old, who turns out to be rough and vulgar. When they try to bring Grace into their family, their grown children are horrified, and only Kevin, a terribly scarred recluse, reaches out to her. When Grace bolts, Kevin leaves his self-made prison to search for her…only to find her in an actual prison. Together this reunited brother and sister find grace and acceptance. Will each find love as well? Book 34 in the bestselling The House of Winslow series.