A brief description of the I Became The Villain’s Mother manga:
I became the mother of the villain, Ain Spenner. Roseria, the real owner of the body, was a bad mother who insulted and murdered her child when he became an adult. But when I saw his sweet look on such a naive and chubby face, I said: “No, he’s so cute. He’s so young, he keeps sucking on his tiny fingers. How can I hurt him?”
The baby was so cute – I couldn’t believe he’d become a villain. So, I decided I’d protect him!