Outline of story

I found this review of Not Easily Broken:

"New York Times bestselling author T. D. Jakes pens a powerful tale of a couple's attempt to survive a car accident, a fractured marriage, and the ultimate temptation. After years of disagreeing on what true happiness, success, and love really are, Dave and Clarice Johnson have finally reached a breaking point in their marriage. When Clarice is hurt in a car accident, the obvious truth that more than just her injuries need immediate attention is exposed. Their odds of making it worsen as Clarice begins to see a physical therapist, and Dave develops a friendship with her and her teenage son. The acceptance and comfort he finds in them stirs his longing for a family and a passionate partner. As temptation tugs at Dave and Clarice pulls farther away, they must confront whether their vows are or are NOT EASILY BROKEN"

I haven't read the book so can anyone tell me what role Brock has in the story?