I Picked Up The Evil Duke’s Child

I possessed an extra whose name wasn’t even mentioned in the romance-fantasy novel I was reading.
To be precise, it’s the Commander of the Imperial Knights under the direct control of the Emperor and the youngest daughter of the Alfrez Ducal family, she is an extra that has no shame in her wealth, status, and appearance.
I was quite satisfied with possessing such a character, and it was when a boy who seemed to have lost his way in the Imperial Palace started chasing after me.
“Mom.”
“Pardon…?”
“Mom! Why are you pretending not to know me!”
I’m sorry, but I’m not your mother…?
Do I look like this child’s mother?
And his dad is the notorious Evil Duke in the novel?
It seemed as if a storm suddenly swept through my peaceful daily life.