"If we weren't pressed for time, I would have liked to set up a new dynasty just for the Jun Family." So, what she's saying is she was interested in getting married to the crown prince? I mean, can't she ask for that later since she told him to meet with her? She makes it sound like that option isn't on the table anymore. Granted, white-haired demon is clearly the ML and I'm fine with that, but they could still marry politically as allies and she can be with her demon brother. Hell, depending on how the three of them swing, they could share her so long as she's fine with it. I doubt her brother would want to, though.