The End Of The World

Kathleens POV

"Why do you need to talk to me?", Tanner asked.
I looked to her thinking to my self "How stupid could she possibly be?"
"Why does my sister have a scrape on her arm?" I asked.
"I don't know."
"Really?"
"Really."
"Why'd you pull a knife on my sister?"
"She tried to steal my stuff."
"SO YOU CUT HER!"
"I DIDN'T CUT HER!"
"WHY IS SHE WRAPPING HER ARM!"
" I DON'T KNOW!"
I finally snapped, I pulled the knife out and held it to her.
"Tell me the truth. " I said
She looked at the kitchen knife then at my eyes. I could tell she was daring me to do it.
"Tell me why you cut my sister and I won't hurt you." I yelled.
"I told you, I didn't do it."
At this point I finally snapped. I punched her in the face and she fell to the ground. I sat on top of her with her on her stomach looking at me. Before I knew it she kicked my back. I rolled on to the ground in pain and whimpered. I had let go of the knife, but haven't realized it. I guess she did and took advantage of the opportunity. She took the knife and held it to my head. I took the hand she was holding the knife in and yanked it away from my head barely scratching my eyebrow, cutting off about a forth of it. I made her stab it in the ground, and with one clean swish I punched her and she was on the ground covered in bruises, scratches, and dirt. I took the knife ready to strike if she suddenly moves.
She layed there looking as if shes been defeated, then she jumped up. Anger filled her eyes, she came for me and now this was a fight or flight situation. Do I let her strike or do I go first? Without hesitation I slit her face with the knife.
Now there was a perfect clean cut across her face bleeding under her chocolate brown eyes. About an inch or so long above her cheek bone.
I didn't know what I just did. Did I just really strike her with my knife across the face.
I guess we were pretty loud or one of them must have seen us because my family came running out of the back door.