Waste Prince: Why do

The prince laughed cruelly, "Noble Consort Qin, this is not an insult!",The Crown Prince's face was grim, like a demon about to choose someone to devour. He retorted to Empress Ji Qin, "Empress, do you truly not understand","His younger brother's daughter I can marry, and other princes can marry her too, but only Ninth Brother is off-limits!"。