Rose Calloway thought she had everything under control. At twenty-three, she's a Princeton graduate, an Academic Bowl champion, a fashion designer and the daughter of a Fortune 500 mogul. But not everything comes easy. When Rose's fashion line is in peril, she plans an unconventional solution to save it. Making matters more intense, she agrees to be in a relationship with her godly college rival, Connor Cobalt. At twenty-four, Connor Cobalt bulldozes weak men. Confident and smart-as-hell, Connor vows to help Rose outside of the bedroom and inside.

No one would suspect shy Lily Calloway's biggest secret. While everyone is dancing at college bars, Lily stays in the bathroom. To get laid. Her compulsion leads her to one-night stands, steamy hookups and events she shamefully regrets. The only person who knows her secret happens to have one of his own.

Prepare for the worst, but hope for the best. That's what Lily Calloway and Loren Hale try to do when his father schedules an important meeting. The problem: after being swept into the public eye and battling their addictions, they're not sure what the worst is anymore. In a sea of many changes—including Ryke and Daisy living with them—Lily realizes that the best part of her fluctuating hormones might just be the worst. Her sex drive is out of control.

Twenty-five-year-old Ryke Meadows knows he's hard to love. With a billion-dollar inheritance, a track-star resume, and an alpha-male personality—he redefines the term likable-asshole. But he's not living to make friends. Or enemies. He just wants to free climb three of the toughest mountains in Yosemite without drama or interruption. And then he receives a distressed call from a girl in Paris.

Cravings and fantasies become her new routine, but while Loren Hale recovers from his alcohol addiction, Lily wonders if he'll realize what a monster she really is. After all, her sexual compulsions begin to rule her life the longer she stays faithful to him. Progress. That's what Lily's striving for. But by trying to become closer to her family—people who aren't aware of her addiction—she creates larger obstacles. When she spends time with her youngest sister, she learns more about her than she ever imagined and senses an unsettling connection between Daisy and Ryke Meadows.