Natalie Barelli delivers a highly engaging domestic suspense with this gripping novel, Unfaithful. Centered around Anna, a successful mathematician whose life begins to crumble, the story explores the dark, hidden corners of marriage, betrayal, and deadly secrets. The Dark Secrets in Unfaithful by Natalie Barelli. Anna is a woman who has built a strong foundation to protect her family. But when she accidentally discovers that her husband is having an affair, her world shatters. Instead of confronting him, Anna decides to play a dangerous game to keep her marriage intact and protect a dark secret of her own. When a local student dies unexpectedly, the police begin asking questions, and anonymous threatening messages start appearing on Anna’s phone. Someone is watching her, and they know everything. This thriller is a suspenseful ride filled with sharp twists, complex characters, and a resolution that will keep you guessing.