The Lust System

Chapter 2 Sister R-18

I planned the whole night as to what I should do to have sex with my sister. The thought fucking my sister and playing with her already gave me a hard-on. So I thought about it the whole night and decided to start my plans the next day.

After I woke up in the morning, I had to get ready to go to school. The same boring stuff happened at school. I see a lot of hot girls at school every time but a loner like me doesn't really have any reasons to go up to them. Maybe next time I'll think of something to 'have fun' with them.

*smiles evilly*

When I got home, there's no one in there. That's how it usually is since my parents are busy in their business that they sleep in the office on weekdays. They just gave us a weekly allowance for our daily needs.

After I changed, I started to implement my plans. My plan is to somehow use the Sleeping Serum to put my sister in her sleep and after that... There's no one in the house and I can do whatever I want. But how would I do that? I need to think of a way to put it in her drink without her being suspicious in any way. The Sleeping Serum is a small tablet, half of the size of my pinky nail and apparently it melts really fast too. So there should be no problem putting it in her drink right?

My sister always gets home at almost 7 pm and she usually takes a shower right after. She then goes downstairs to eat. Oh, I know! She usually has a glass of water by her bedside that she drinks before she goes to sleep! But how would I put the Sleeping Serum in there without getting suspicious in any way?

Just as I expected my sister got home from school. She went up right away probably to take a shower. I'll just try to find an opportunity as she goes down to eat.

While I'm eating, I heard someone going down the stairs. There she is, my sister, hair still wet as she just showered. She was wearing a pair of buttoned silk pajamas and she's not wearing any bra! You can see the pointy tips from her top as she goes down the stairs and her breast slightly bouncing as seen on the outline of her pajamas. Her curvy waist and long legs are also easily seen as the pajamas stick to her tightly. I'm starting to get turned on with my dick starting to stand up!

After that, she just sits down and eats her food while busy using her phone. She doesn't speak to me at all! Anyways, there it is! She fills up the glass of water that she brings in her room. After I'm finished eating, I went ahead to wash the plates that I've used. After that, while still thinking about how to put the Sleeping Serum into the glass of water.

My sister asked me, "Hey Max, can you also wash my dishes since you're doing it anyway?"

"No way! You do your own dishes!" I said not wanting to waste the opportunity. I pretended to run away from her and went down to my basement halfway to wait.

I was waiting for the sound of the water from the kitchen, it was then *water flowing*

I ran back up as fast as I can without making any noise and went straight to the table and put the Sleeping Serum into the glass of water while watching the kitchen floor for any movement from the shadows. Seeing that there is none, I immediately ran back to my basement to wait for the time she sleeps.

At midnight, I slowly walked upstairs to my sister room because she usually sleeps a few minutes before midnight. But at this time, there's a one-hour time limit for the Sleeping Serum to work. So I can't waste any time and decided to go now. I arrived outside of my sister's room and started doing what I planned.

"Sis!" *knocks the door*

"SIS!" *knocks the door harder*

Seeing no one answering the door, I slowly opened it. I then saw my sister sleeping in her bed, it looked like she didn't notice anything and just went to sleep as her glass of water is half finished. I slowly went close beside her, then slowly move her to see if she's going to wake up. I grabbed her breasts slowly to check if she's waking up.

Seeing she isn't waking up, I played with her breasts with both hands. Feeling her big but firm breasts that are bigger than my hands, I started to feel my dick stand up. I went to pinch her nipples from her pajamas since she's not wearing any bra. Her nipples felt incredible as I pinch it in my hands. I want to suck it! No, I'll do that later. I looked at my sister's body, from her pink lips, her white smooth neck, her perky breasts, to her thin waist and long thighs. I went and reached for her buttons.

I start undoing my sister's pajamas. I became clumsy because of excitement and nervousness and couldn't nicely unfasten it, but I finished unfastening her top after a while.

I slowly opened the front of the pajama with hands shaking and looked at my sister's body closely.

Before my eyes are my sister's amazingly big breasts. Looking closely, my sister's breasts has a perfect shape and it looked firm, it doesn't sag in any way, even when she's currently lying down. The little bud in the middle also looked like it was tempting you to suck it.

Completely removing her top, I was able to see her everything. I trace my hands against her smooth white skin that's free of blemish. I hold her slender waist that doesn't give off any feeling of fat. *breathes heavily*

I lost patience so I held her breasts and kissed her lips. I pinched her nipples with one hand and grab her breasts with the other while sucking her lips and playing with her tongue. I then removed her lower pajamas and she's now left with her white panties.

I looked at her whole body that looked hot lying almost naked in front of me. I climbed up her bed and went on top of her. I started kissing her nipples, licking it and sucking it hard. I tried biting it, it was addicting! After a while, I went up and slowly kissed her all over her white neck, feeling good for some reason.

I then started to slide a hand down into her panties, I slid my hand inside her panties and felt her hairless slit. My hard-on was threatening to break out of my shorts. I tried to open her pussy with my fingers to feel her insides but I wasn't successful. So I went down from on top of her to kneel between her legs.

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