The story
He wants her to coach his mistress.
Lily Pearson walked away from her own tennis career to build her boyfriend Adam's, and it worked, right up to his Grand Slam. The fame changes him for the worse. Adam is involved with a younger tennis star, Mia Sparks, and now he wants Lily to coach her too. She knows she only has two choices now. She can swallow the betrayal and keep loving a man she no longer recognizes, or she can leave and find out what is left of the player she used to be.
