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The Fifth Princess met with misfortune, and the Second Prince was enraged. He went to the Princess's Mansion, beat the Prince Consort savagely, and then ordered his men to use torture to extract a confession, revealing the Prince Consort's collusion with the Third Prince.
By this time, Ruan Hongwen's face was swollen like a pig's head, lyin on the ground wailing, unable to even stand up.
If he did not confess, the very root of his manhood would be severed right there.
He had no offspring yet, and the child purportedly conceived by the courtesan wasn't his at all.
Now that the Fifth Princess surely could no longer bear children, if the root of his manhood were to be cut off, he would be without descendants forever.
So he sold out the Third Prince, claiming that the Third Prince wanted to buy his loyalty, and had sent this female assassin to stay by his side.