In Princess Luyan's view, her husband deserves to die in the dark forest, where no one would think to search for him, where no one would find him no matter how hard they looked—if anyone even wanted to search for him at all. Everyone believes he abandoned her for a beautiful, captivating woman due to his obscure origins. This is what happens when a Tulipian girl marries a man from outside the Tulip Kingdom: he will leave, leaving her lost, broken, and alone.
This is exactly what happened to her—or at least, that's how everyone sees it. That's the version of the story they tell their daughters to prevent them from falling into the same trap Princess Luyan did. She has simply brought disgrace to the Desman family, and even now, her mother is not pleased with her actions.