Love on Deck by Kasey Stockton

He calls it fake dating, but she calls it caught between the devil and the deep blue sea.

Lauren Foley and Jack Fletcher already tried to be amicable once—on a blind date that ended in complete disaster. Now, years later, they have to put up with each other for the sake of her sister and his best friend, who are eloping on a cruise to the Bahamas. But that’s not the worst of it. No, Lauren’s in even deeper water when she finds herself agreeing to play Jack’s fake girlfriend for the duration of the cruise.
Now the only thing on her mind is trying not to strangle him when he dials up the charm, but it becomes harder to remember exactly why she ever hated him in the first place. Jack, on the other hand, is enjoying the perks.
Until the cruise lands on American soil again and real life hits them square in the face. Lauren is up for a promotion at work, and Jack promised her something that would secure it. But promises are easily broken, vacation life doesn’t always translate to the real world, and sometimes enemies start that way for a reason.