The Magical Beasts Calls Me Mother

I died from exhaustion in a world that never wanted me.
When I opened my eyes again, I was no longer a nameless office worker...
I was the beloved daughter of a duke inside a novel I once read.

But here's the problem:
I'm not the heroine.
I'm not the villainess.
I'm just the "ex-friend" side character who was supposed to fade away quietly.

That was my plan too-
...until I stumbled upon a black dragon's egg.
Until it hatched and called me "Mother."
Until it transformed into a child and dragged me into the center of every noble's gossip, every battle, and... every man's heart.

Now the male lead won't stop appearing in my life, the second male lead keeps getting too close, and even the villain himself seems interested in me.
And worst of all? The so-called heroine is furious that everything she wanted... is becoming mine.

I never asked for this.
But if fate insists on putting me in the spotlight-
then fine.
I'll shine brighter than anyone else.