Salacian Sapphire by Chloe Parker

Ten years ago, Tasha Kincaid lost everything in a heist gone wrong. Since then, she’s spent every day plotting her revenge on Veronika Greer, the woman who double-crossed her. So when Tasha learns of Veronika’s brand new cruise ship – and the fortune held within – Tasha knows exactly what she has to do.
Baz Vaughn is a mercenary with a price on his head, criss-crossing the galaxy in search of the job that will finally make him enough to pay his bounty. The two meet by chance, and what begins as the promise of a one-night stand transforms them from strangers into partners in crime. If they want to outsmart Veronika, they have to put aside their instant chemistry. But the more they get to know each other, the harder it gets to deny their attraction – especially on a ship designed for pleasure.