I Lost the Leash of the Yandere Male Lead

I transmigrated into a novel and became the villainess,

Serina who comes from the noble Ducal Melford family.

As a well-to-do character, I tried to mind my own business,

but the story had other ideas.

A self-proclaimed mother brought back a boy – the duke’s heir and a genius wizard – intent on brainwashing and blackening him.
The contents of brainwashing are two things:
1. Obey our family.
2. And fall in love with Serina.
Thanks to that, the brainwashed twisted yandere is obsessed

with me… I can’t do this. I have to undo the twisted character’s brainwashing!

By the way, what’s this situation? “Now that the brainwashing is gone,

I’ll do as I please. So Serina, please, let’s do our best.”

I’ve solved his brainwashing…

but why does he seem even crazier than before— Did I make a mistake?