Married For His Heir by Sara Orwig

A billionaire, a baby and a bride of convenience?

Oil baron Nick Duncan swore off entanglements of the heart after his wife's and son's untimely deaths. So when Talia Barton introduces him to his orphaned daughter from a grief–fueled fling, he knows he's in trouble. Talia won't let the motherless child she's been caring for become a ward of the state. But she never expects the handsome Texan to propose marriage…and actually mean it!