The Tycoon's Paternity Agenda (Black Gold Billionaires 1) by Michelle Celmer

Adam Blair, billionaire oil baron. Dream: Producing a much-wanted heir. Dilemma: Keeping the arrangement strictly business.

The time had come to move on. CEO and widower Adam Blair was determined to find the right woman to carry his baby. And when Katy Huntly, his late wife's sister, discovered his plan, she demanded to be the surrogate. The agreement certainly made sense...on paper. Adam had always felt a certain pull toward Katy, and those feelings only intensified the closer they grew. But falling in love had no place in this tycoon's agenda. How could he imagine allowing their relationship to progress beyond nine months?