Minx by Sophie Lark

Ramses Howell is a self-made man. He’s proven he can get what he wants, and from the moment Blake Abbot catches his eye, she becomes his top priority.
Blake wonders what took Ramses so long — she knew who he was years before.
They strike a deal to play a very specific game.
Ramses created the game for Blake.
Blake adds rules that Ramses has no intention of following.
As fantasy invades reality, the arrangement consumes them both.
Blake and Ramses cross lines they swore they never would, and each begins to question what they thought they always wanted.