To their friends, Nick and Cathy Chance have the perfect marriage. High school sweethearts who've been together for ten years, they've weathered challenges and are as committed as they were when they first fell in love. Cathy trusts Nick, Nick's world revolves around his wife, and the future looks golden.

To everyone who knows them, Cathy Chance and Roxanne Ruiz have a perfect friendship. They connected in grade school and since then have been each other's confident and trusted advisor. Cathy loves the gorgeous Roxanne like a sister, Roxanne has fun-loving Cathy's back in every situation, though lately there's been tension between these two best friends . . .

And then, on a sunny summer morning, the unthinkable occurs, throwing into doubt the truth of what each of these people really know about themselves and one another.

Will Roxanne's sacrifice be too little, and too late? Should Nick's love for his wife be strong enough to risk trusting his heart more than logic? Can Cathy's devotion to Nick give her enough strength to convince him to see her for who she really is?

Secret Sister proves how strong, how stubborn, and how trustworthy love can be as Nick and Cathy and Roxanne are challenged to overcome the secrets, the lies . . . and one extraordinary twist of fate that turns their lives upside down.