Demonic mates~ Sebastian x reader

24. Intruder?

I know Ella looks more like a wolf but I couldn't find something that fits the description properly.

Y/N P.O.V

I finished cleaning the kitchen and a small bang echoed from the bedroom, causing me to freeze before dropping the dish and running up to the bedroom. A loud growl escaped my lips as a woman stood over the cribs, a small smile on her face. She had pitch black hair and pale skin.

"Get the fuck away from my kids!" I tackled her to the ground and growled, just as Sebastian and Ciel ran in.

"What have you done Serra?" Sebastian growled and I glared at him.

"You know this bitch?" Sebastian glared at her slightly.

"Come on Brother! I only wanted to see my niece and nephew!" She whined and Ciel put his hand on my shoulder.

"We can't question her if you kill her." I rolled my eyes and got off, still glaring at her. I looked over the twins and smiled to see them unharmed.

"I heard you had a strong mate Sebby!" She hugged MY Sebastian and I growled slightly.
"Please don't growl!" She hid behind Sebastian, pretending to be scared.

"What do you want Serra? Why are you here? Really?" She stood up and straightened out her clothes.

"Father wants you, let's say he's a little more than pissed." A wicked grin spread across her face as she stoked Ciel's cheek.
"After all... you killed little brother and that tart that always hung around him." Wait...Claude was his brother?!

"Why did he send you? Of all Demons?" Ok, now I'm confused.

"I have a job to do!" She smiled proudly and walked over to the cribs, dragging Ciel with her. She picked up Ed and I moved forward but Sebastian stopped me. She put him in Ella's crib and put Ciel's hand on the crib before chanting something in Latin, the crib began to glow and I struggled in Sebastian's grip. Ciel collapsed and I began to panic, but Sebastian wouldn't budge.
When the glow stopped Sebastian let go of me and I ran to the crib as he pinned her to the wall. I let out a gasp at the two, fully grown, animals. I looked at Ciel who had also aged, he looked about 19.

"What did you do?!" Sebastian's eyes flowed as he strangled the green eyed girl.

"A simple ageing spell. New law states no child demons because they're too dangerous!" She grinned before kicking Sebastian off her.
"I'll see you soon big bro!" She jumped out of the window and Sebastian got up with a groan.

"What was that?" I asked with worry.

"That, Y/N, was my little sister Serra Michaelis, half demon, half witch." He sighed and looked over to the three unconscious demons.
"And I'm going to bloody kill her."

New chapter cause I probably won't be able to update tomorrow