Prince Xian was aware of the conflict between his son and Mrs. Kong. After all, if his son could not carry on the family line, he would not have brought another concubine into the mansion.
Now that Mrs. Kong is pregnant, the position of his son's Princely Heir is bound to be shaken. Everyone understands that they cannot allow someone who cannot carry on the family line to inherit the Prince Mansion's title.
This is also why his son is targeting Mrs. Kong, wanting to get rid of the child in Mrs. Kong's belly. Without this child, with only one son, even if he had such a defect, they could only let that son inherit the title at that time.
And the conflict between his son and the Dingyuan Marquis Mansion is also well understood. If not for the Dingyuan Marquis Mansion, his son wouldn't be like this now.
