Flaw in the Defense - Tarina Deaton

Paige Davis made a split-second decision years ago – one that made her into the woman she is today. A strong, independent executive of a private security company, she lives her life with no regrets and no apologies. But when a girl's trip to celebrate her birthday leads to wedding crashing and a hot vacation fling with the bride's brother, Paige starts to wonder if her life might be missing a few things after all.
Sebastian "Ash" Moreno assured his sister he'd ignore work and his business partner during her wedding weekend and Paige is the perfect reason to keep his promise. He may have no idea why the confident and beautiful Paige is interested in a nerdy programmer like himself, but he's not going to mention she's completely out of his league.
Back in real life, Ash discovers his company is missing a large sum of money right as it's about to public. Hiring an outside investigative firm is the smart choice, especially when the company COO turns out to be...