The Crown Prince values emotions and loyalty. You can tell from how he takes care of Prince Ming; he's always been someone who repays kindness.
Therefore, the Crown Prince's attentiveness to that young man might suggest that he isn't his biological son but rather the child of an old friend.
But if that old friend is a woman, then it's an entirely different matter.
She could tolerate the Crown Prince raising ten or even eight children of old friends, or even illegitimate sons, but she absolutely wouldn't allow the Crown Prince to keep another woman in his heart.
The Crown Prince's heart must belong to her alone.
She wants to be the Crown Prince's only woman.
To become the mistress of the Crown Prince Mansion, to be the future Empress of Great Liang.
