Let's toss out some descriptions and see who they apply to:
The hero and heroine meet in a place where they didn't expect to see anyone, resulting in a physical assault. They then bond while taking care of a young man under her responsibility. She has a desire to explore while he holds a noble title.Venetia and Damerel? Yes. But that's also Cordelia Naismith and Aral Vorkosigan. There's so many parallels that I can't help wondering if this book was an influence on Lois Bujold as she wrote Shards of Honor.
The key tension in the plot is the hero's bad reputation. He'd fallen in love as a young man, but it went bad and ended in dueling. With his reputation at bottom he decides to live down to it and becomes famous for his drunken misbehavior.
They're separated for a while. Eventually she returns under circumstances that trash her reputation back home and finds him drunk. They marry.