Fran flies at me with incredible speed for such a tiny person, and her tiny hands are around my throat quicker than I can stop her. Aunt Grace rushes towards us, and grabs Fran around the waist; attempting to pull her off of me. She has the strength of Chara for Asriel's sake! I start to black out at the edge of my vision, and instinct from months of fighting Sans, Asriel, Flowey, and Chara kicks in. I flip us over on the floor and pin her arms down, and knee her in the stomach. She winces in pain, but I merely smirk.

"Don't try to hurt me, I have faced bigger and badder demons than a bitch like you. I don't care if you're my sister, I will rip your guts from your body via your neck, and then turn you to dust." I growl in her face, and she recoils in fear. I revel in the small victory, and let go of her arms. Fran quickly uses this to her opportunity and rakes her nails down my face, leaving painful cuts. I swear in pain, and punch her full on in the face, before slamming her head onto the concrete flooring. Aunt Grace yells at us, but we continue wrestling on the floor.

"Go away Frisk, you bastard child." Fran spits in my face, before a stabbing pain erupts in my side. I look down at my waist and see Fran injecting a red substance into me. My muscles spasm momentarily, and I fall off of my sister, leaving Aunt Grace an opportunity to grab the little girl from the floor and strap her into her bed. I crawl my way up the wall into a standing position, and nod towards Aunt Grace who merely tells me to leave quickly. 

So I wander into the streets, the sounds of police sirens echoing in my ears.