Zac’s friendship with Cal is the foundation of his career and—until Anya and their son came along—the most important relationship of his life. Cal’s a cipher, someone Anya can’t help but gravitate to, even if they don’t always get along. Even more, she’s drawn to the Zac she sees when he’s with Cal—a careful, cautious version of her husband, someone with hidden thoughts and desires kept secret even from her. Inviting Cal into their home, deeper into their life, is a risk.