4 ways sisters can murder you

Prolouge
The last night I spent with that evil bitch was great I ended my day with a slip of a blade.Heres how it goes

Chapter 1 The funeral
Everyone was crying but I was evily laughing. Not knowing what I did my sister in a coffin as we all said goodbye i spit in her face and whispered "see ya in hell bitch!". I swear she looked at me and said
"love ya too!" she was always the happy one she had a boyfriend and I didn't she had friends and I didn't. She was perfect. never made fun of but she was the bitch I slap, The devil I kill , the horrible monster under my bed. she also had my parents love...

Chapter 2 How it all happened.
One night she really pissed me off she needed me to go to the mall and take her on a shopping spree (which she expected me to pay for) since I was the only one that could drive and I was the only one with a job. So of course I said no but then I had the perfect chance to get back at her right then and there it was time.So we went to the mall and I told her I needed to go to gamers to get a new manga . She said okay since I was paying for it but then I went in and she started complaining that she wanted to leave "SHUT THE FUCK UP!" I shouted. She suddenly started to get embarresed and shrunk down slowly and sat against the wall. We finished up in there and we left.I was acting nice (accept for the whole shut the fuck up thing which wasn't my fault shes a whiney bitch) . So we went to where she wanted to go blah blah and I read all 20 of the manga I bought (she took so long I had to keep running from the store to gamers to get a new manga 20 times after that I thought "ahh what the hell I'm not wasting more money because this bitch is slow"). So then I one of my friends and I waved and told my sister I was gonna go hang out with them for a little bit. "oh no you don't" my sister warned
"you know what you little bitch I'm paying so go fuck yourself" after that my sister gave me a look like she was a smart ass. When we arrived at home I came up with a plan...