My Rough Uncle by Nicole Houston

Nina: She’s beautiful, and her family’s wealthy—but Nina just wants to find her way in the world, get away from her influential family.
She tries her luck in Vegas, but ends up married to a man she just met.
She has no recollection of their wedding when she wakes up in his bed.
When her husband introduces her to his lifestyle, contrary to the expectations she was raised with, she finds that she likes it.
But when she decides to leave him after a fight, even escaping to college can’t get him out of her head…

Richard: When he meets Nina, he knows he can’t have her, and therefore he takes the necessary precautions to avoid her.
He’s in Vegas with his friends to unwind. Nina is the kind of woman he can’t have—he knows it as soon as he meets her. Then his friends dare him to spend the night with her. One thing leads to another, and they wake up married. Nina wants out, but he can’t bear to lose her. How can he let go of the one person who’s ever made him feel alive? Then her betrayal changes everything…