Will the billionaire dad wed the surrogate mom? Find out with USA TODAY bestselling author Yvonne Lindsay! Kayla Porter vowed to be a surrogate for her deceased sister's embryos. She's already given birth to her niece Sienna. But a clinic crisis means she's running out of time to fulfill her promise. She needs Donovan Murphy's help—if they can work around the explosive chemistry that's reignited between them! The tech tycoon agreed to be a sperm donor, not a father. But that changes when he meets his baby daughter Sienna. He will claim his little girl…and her passionate, headstrong mother!