Reborn: Voldemort's Sister in Harry Potter

[Reborn as the eldest daughter of an evil aunt + doting big sister + straight-woman disease + Slytherin young lady with a certain magic + slow pace]

I was reborn!

I seem to have become a child in the family of Harry Potter's evil aunt, but I don't have “that.” I'm the eldest daughter of the Dursley family...

Right now, Mom is holding me in her arms and feeding me milk.

The next moment, the doorbell rings. Mom holds me and gets ready to answer the door.

Wait, don't go any farther. I'm not ready yet. Don't... I want to say that, but I can't speak fluently enough.

All I can do is fidget irritably in Mom's arms. She just gently pats my back.

Mom opens the door and looks outside. Then she notices a “package” on the blanket?

Inside is a baby who looks about the same age as me.

Heh. Now it's confirmed.

This must be Harry Potter. Thank you, heavens!!! Sending me to the Harry Potter world was bad enough... and now I'm a cannon-fodder Muggle, too.