The Unhoneymooners
Christina and Lauren (the co-authors) have written a bunch of fun rom-com but this is a favorite of many people because it's absolutely hysterical. Olive Torres is always unlucky. By contrast, her sister Ami is an eternal champion...she even managed to finance her entire wedding by winning a slew of contests. Unfortunately for Olive, the only thing worse than constant bad luck is having to spend the wedding day with the best man (and her nemesis), Ethan Thomas.
Olive braces herself for wedding hell determined to put on a brave face, but when the entire wedding party gets food poisoning, the only people who aren’t affected are Olive and Ethan. Suddenly there’s a free honeymoon up for grabs, and Olive will be damned if Ethan gets to enjoy paradise solo. When they run into her boss, the entire vacation revolves around pretending to be loving newlyweds. It's adorable and fast-paced because of the constant (and hilarious) complications that arise.
Link to buy: https://bom.so/yAxctG