<human>: Can you give me a shortened version of the text?

Now, this happened around 6 years ago. I was at that age where I was a goody two shoes. Like if my mom told me to eat a dick I would eat a dick. 

So anyways, it was almost Christmas time. My sister went out to buy some presents and I went to go draw shit on the wall. She came back with Christmasy bags with my present in one of them. She put the presents on the table and went to go eat dinner. I was super excited and took a quick glance at the bag, wondering what it was. When I came to eat dinner shortly after, she asked me to guess what it was. Now being a huge rubix cube nerd, I guessed the rubix cube. My sister then frowned and asked why did I look inside the bag. I said I didn't but she wouldn't believe me. This made me furious and upset that my sister didn't trust me. 

Here is where the Fuck Up starts. I finished eating dinner super fast and I stole the present for "revenge". I took the Rubix Cube out of the bag and hid it next to my bed. Now me being young and not having brain cells yet, I took the bag too, leaving plainly visible on my table. So when she came back up the stairs, she sees one of the bags on the table missing and a bag in my room she knew. She came to my room upset and yelled at me, asking why did I peek and lie and saying that she trusted me. So, as a kid, I was confused and didn't know why I was being yelled at because I knew I told the truth and then it hit me. I'm a dumbass.
<bot>: Sister got presents, guessed what my present was, sister thought I peeked at what my present was, got mad, stole present, and got rekt.