Buy Me, Bride Me by Layla Valentine

For richer, for poorer…

Office worker Jada Phillips hates her job, but for reasons close to her heart, has no way of quitting. When she accidentally offends a major client, however, she finds herself under the steely-eyed gaze of the trigger-happy CEO…
Jackson Hays, the ice-cold billionaire with baby blue eyes, is a hair’s breadth from closing the biggest deal of his career, but a tiny bit of paperwork stands in his way… He needs to get his hands on a marriage license, and Jada’s dual ancestry could be the final piece of the puzzle.

They make a deal: fake marry one another and solve their respective binds: Jada saves someone close to her, while Jackson nets another billion.
As the wedding approaches, and keeping things “business only” proves more and more difficult, the stakes could not be higher.
Will Jackson allow himself to break their terms?