Never ask me / Jeff Abbott.

Enhanced descriptions from Syndetics:

Each of us has a question we dread.

In a quiet neighborhood in the wealthy Austin suburb of Lakehaven, the body of Danielle Roberts is discovered on a park bench. Danielle was a beloved member of the community, an adoption consultant who delivered the joy of parenthood to a number of local families. Her murder shocks Lakehaven.

Perhaps no other family is as crushed as the Pollitts, who lived two houses down from Danielle and thought of her almost like family. Her death becomes the catalyst for a maelstrom of suspicion and intrigue. You have been told a huge lie, an anonymous email charges the son, Grant. No one can learn the truth now, thinks the father, Kyle. Never ask me what I'd do to protect my family, resolves the wife, Iris. I'll do whatever it takes to save him, vows the daughter, Julia, of Danielle's grieving teenage son.

The Pollitts always thought they'd always be there for each other. When each begins to suspect the others of the unimaginable, the strength of their bonds will be tested in extraordinary new ways. The latest from New York Times bestselling author Jeff Abbott is his most suspenseful thriller yet: a riveting tale of the dangerous secrets one family has concealed-and what happens when the question each Pollitt hoped they'd never be asked threatens to expose their darkest truths.