Faking Forever by Catherine Bybee

Shannon Wentworth’s biological clock is ticking, and she isn’t going to let her single status keep her from having a baby. When her wedding-photography business takes her to Mexico, she has every intention of finding a willing baby daddy to help her out. Until the bride goes AWOL, leaving Shannon to coddle the arrogant fiancé who has accused her of sabotaging his wedding.
Victor Brooks never could have imagined that he’d be on a honeymoon for one. Only here he is, taking a hard look at his life after the younger women he thought he loved walked out. The woman who volunteers to help him reflect is the last person he expects to be attracted to. Between the tequila, the sun, and one earth-shattering kiss, Victor finds Shannon a distraction too sexy to ignore.
They strike a deal: wait three months, cool off, and see if their tropical beach attraction is worth taking up when they go back home. Unfortunately, that’s just enough time for the past to come calling. All their best-laid plans are at risk. So is the last thing Shannon expected to matter the most: her heart.