Marrying Mr. English (The English Brothers #7)
Katy Regnery

When Eleanora Watters, a smart, sassy - totally broke - waitress, spies down-on-his-luck Tom English in the breakfast-all-day diner where she works, she doesn't think much of him. He's at least ten years older than she is and he looks like another trust fund jerk with a silver spoon shoved up his...a-hem. But Tom surprises her. Set up on a blind date by Eleanora's cousin, the two bond over books, and after spending just a few hours together, Eleanora offers to marry Tom in order to help him secure his fortune.
After a whirlwind marriage in Las Vegas, Tom and Eleanora begin to realize that they're not as unlikely a match as they once seemed, and their feelings for each other deepen. But when Tom's grandfather sees through their scheme and threatens to cut them off, Tom will have to decide if he wants the money more than the Colorado waitress who seems to be something between "a dream and a miracle."