The Crown Prince didn't have the support of his mother's clan, and because the Crown Prince had voluntarily surrendered in this battle, he had even ceded his territory to compensate them. After returning to the palace, he was joined by the other princes and forced out of the Northland.
Rather than saying that he was a guest, it was better to say that he was a hostage in exchange for benefits.
Their Taizhizi didn't openly acknowledge Princess Ming Yue because they were afraid of bringing trouble to her.
Actually, with his thoughts, the Crown Prince was worrying too much. However, the Crown Prince's only relative in this world, other than his cold-hearted and cold-blooded Imperial Father, was only this Princess Ming Yue. The Crown Prince's cautiousness towards the matter of recognizing relatives was inevitable.
