The Poisonous Spoiled Heiress!

One day, “My lord, the Yan Emperor says he's rich and wants to use the state treasury as my betrothal gift, so I'm going to be queen.” She waved the key to the state treasury with a smug look. The prince's eyes darkened. “Oh? Is that so? Give the order: march on Yan at once and wipe it off the map!” She: “…”