Lu Hong walked slowly, as if showing off, or perhaps giving some people a chance.
Yes, Lu Hong had the impulse to kill Luo Jinhong, but Lando wasn't wrong; the Luo Family is arguably the second-largest family in the Sky Domain. Moreover, her marriage with the other party was entirely for political purposes. Clearly, the Luo Family and the Dukeesa family had long established some special relationships, which wouldn't collapse due to a single failed marriage. In fact, this marriage was just the icing on the cake to their alliance; whether it happened or not made little difference.
If Lu Hong indeed killed Luo Jinhong, the most precious young master of the Luo Family, he and Lando would face endless pursuit from the Luo Family. Moreover, other families allied with the Dukeesa family and the Luo Family would join the hunt. Despite the vastness of All Heavens and Myriads of Worlds, they would inevitably run out of hiding places and eventually be discovered.