Me and Riley were in the lair watching tv.
"Hey wanna play a prank on the boys?" Riley asked
(😈)
"SHELL YEAH!" I yelled pumping my fists in the air.
"Haha! Good! You get Leo! I got Donnie."
"Cool! I'll go get supplies!" I rushed out leaving Riley to do her job.
Riley's pov
As y/n left I headed to Donnie's lab and made fake blood.
"Oh this will be good!" I laughed evilly.
"Mwahahaha!"
As the fake blood was being made I went to a beaker and broke it. Then I put bubble rap around my rib and waist to chest, then I took the broken beaker and dipped it into the fake blood to make it look like it had blood (duh) then I stabbed it into the bubble rap. Then I poured it on my shirt (good thing I hated that shirt) then I made a trail of blood.
Then I heard foot steps. I turned and saw y/n smiling.
"Here put this on your hands to make it look like you killed me ok."
"Sure thing" y/n did as she was told then I handed her a knife and dipped into the "blood"  and handed it to y/n.
"Ok now dip your hand in this and put it on your shirt, face, shorts, and legs."
Y/n nodded bad fit as told.
"Hahaha now let's Socrates the lair with blood spills and stuff." I said and we went to work.

An hour later we heard the boys coming. I gasped.
"Quick get into place." I mouthed and we ran to our spots.
I lyed on the floor with y/n hovering over me.
(Me and y/n are actors so we're used to this) "ready?" I mouthed y/n nodded.

Donnie's pov
"Riley?! We're home!"
No answer. Then I heard a scream from the lab.
I ran to the lab doors.. Then I stoped.
"Haha. The boys will never see her ever again. Sorry sister but that's just how it works." Y/n said evilly. Then she grabbed her phone and diled a number.
"Hello.. Shredder! Yes she's killed. I know I'm getting there. With my sister out of the way the turtles will be weak with sadness and will never expect me to be the one who killed my sister."
I quietly backed out of the door way and went to find Leo.
When I found him he was in the dojo.
"Leo corn with me! Now!"
He got up and followed me.
Then he gasped.
"What happened?"
I pointed to y/n who was writing on a pice of paper.
"Ok cross off Riley.
Now time for.. Ah Leo."
He gasped
Then y/n turned to us.
"Oh hey guys." She said acting casual.
"YOU KILLED YOUR SISTER!!" Leo yelled
Y/n looked at her sister who was on the floor.
"Oh her... I got back and she was I. The floor..."
Then there was giggles from the floor I looked to see Riley laughing her head off.
"You..(laughs) should've...(laughs) seen..(laughs) your faces!!!" Riley said through laugher.
"Riley!! You scared me to death!" I yelled and Riley sat up and looked sad.
"Oh fine I forgive you... Good prank girls." Riley and y/n smiled
"Thanks. It was Riley's idea." Y/n said.
"Hehe.. Yeah.. I gonna take a shower. I'll be back." Riley said as she walked out Of the lab.
"(Giggles) you really should've seen your faces!" Leo rolled his eyes and walked away.