You had been forced to wed Nasir and it upset you at first. You had thought your true love was the prince of a tiny neighboring kingdom. That all changed once you realized how much wealth and power you could easily gain. The prince was easily forgotten and you realized Nasir was just an inconvenience to dispose of. You just needed to create ways for him to bring himself down so you could steal the throne. He might have been an evil king but you? You would be a nightmare.