The Sovereign's Ascension - Chapter 21 - Greater Mastery in the Sword Technique

Three years ago, Cambria Vale was the trembling bride standing beside Maddox Raye the powerful billionaire who humiliated her and destroyed their marriage before it ever had a chance to bloom.Now she’s back. Not as his wife, but as a rival. Hardened. Beautiful. Unrecognizable. And hellbent on revenge.When a media scandal threatens Maddox’s empire, he’s forced to remarry the one woman he thinks he can control. But Cambria isn’t here to be tamed. She’s here to burn his kingdom to the ground.The only thing more dangerous than betrayal… is falling in love with your enemy again.

Kim Jeongjin, an editor of a publishing company on the brink of closing due to bankruptcy, ends up transmigrating inside a fantasy novel as the incompetent youngest son of a wealthy family.

And here he thought that he should live a rich life in this life…

“Why was I given a high-level skill? Don’t even bother!”

Su Ran, a music prodigy, woke up transmigrated into a book.

At that point in time, the main story arc in the book had already been completed. As a villainess female supporting character, not only did she need to take over the original owner’s pitiful life in poverty, she also gained an instant son right at his rebellious period.

Ten or so more years from then, the son would turn into a twisted, evil villain. He would appear in one of the extra chapters to pick on the male and female lead’s children.

***

Su Ran: Son, you shouldn’t be too outstanding.
Su Han: Why not?
Su Ran: ’cause you will be killed.

Su Ran: Son, would you like to learn music from me and become a zen, little fairy boy who only needs to drink dew.
Su Han: No, I want to go into business so I can support you.

- Description from Novelupdates

Once she crossed through, she actually became the disfavored third WangFei?