Impregnating my Unsuspecting Sister

Impregnating my Unsuspecting Sister

So let me start with me. My name is Scott. I’m 25 years old, average build, blonde hair and work too much. I had recently moved back in with my parents as I had broken up with my girlfriend. So I was now living with mum, dad and my much younger 13 year old sister.
My sister’s names is Lauren, she is very tiny for her age, at only 4”6’ tall she looked more about 11 or 12 maybe. She has long blonde hair, blue eyes, tiny a cup’s, but let’s be fair since she is only 13 and just really hitting puberty. She is however very slim and athletic, tight and flat tummy, nicely forming hips and a heavenly little bubble butt. She is a gymnast and trains really hard and as a result she is very fit and also very flexible.
Now to begin with I just went about by business and she went about hers. After a few weeks had past my mother asked me to take Lauren to her gym class one Friday morning. While not happy I agreed and got ready. I drove Lauren into town and we headed into the gym centre. I went and sat on the side with the other parents to wait. When Lauren was stripping off her track pants and jacket I saw her for the first time in her very tight leotard. The sleeves run from her wrists in pale baby pink up her slender arms and over her shoulders. The tight fit over her newly budding breasts, holding them firm and round, the leotard also had little shiny sequins scattered over her breasts. The pink leotard flowed down from her breasts and firmly over her beautiful flat tummy and continuing down to a tight little V shape covering her pussy and nicely flowing between her legs and disappearing. Lauren then turned around and lent forward to place her clothes into her bag. The site was just amazing to see. The baby pink leotard came off her shoulders and ran down her back, showing off her forming hips on the way. Then tightly flowed over her wonderful little bubble butt. The sides of her leotard gripped firmly to the sides of her butt cheeks, keeping then covered and hidden from view, and all this leading down to another lovely V disappearing between her legs.
I hadn’t had a fuck in 3 months, given my bad relationship and then breaking up and moving back home. I couldn’t help but feel my cock getting firm. I was so surprised by the sight in front of me, my sister, barely even a teen, turning me on in a way I hadn’t ever felt before. Even with all the other girls their and many of them older and more developed, I couldn’t stop staring a Lauren her entire session.
When we were finished we headed home. My intention was to get home and head to my room and jack off a load. When we got inside I saw Lauren head into the kitchen and get out some tablets and take them. I had to ask her, “What are those you took?”.
“Pain tablets, I get really sore after sessions, so I take them during the day when I need to and I take sleeping pills after I get home for night sessions if needed”.
Instantly I got thinking about it, what it meant and what it meant for me. I decided not to stroke out a load this morning, but I did advise mum that I would take her to training this afternoon after school. This also allowed me convince my mother and father to head out for the night, have a nice dinner and movie and even a few drinks. I knew this meant they would not be home till really late.
Lauren arrived home from school, and I advised her that I was taking her again. She went and changed, returning in the tracksuit again. We hope in the card and headed back into town. Just like the morning we arrived and I headed over to the parents waiting area. And again just like the morning Lauren took off her track pants and jacket, revealing her super fine, tight and very young body to me to look at for the next hour or so. However this time she was wearing a shiny, metallic white leotard. It shined all over and again had sequins glittering off her chest. The leotard looked maybe even a bit tighter than the pink one from the morning. It flowed very firmly over her tiny pussy, tight enough to really show off her mound underneath. I was ready to burst in my pants right then, but knew I had to hold it. Again, just like the morning I only stared at Lauren the whole session.
We arrived home and both headed to the kitchen. I made some light pasta for dinner and we ate quietly at the table. When I was done, I offered to get Lauren her tablets and a drink. She accepted and I headed to off to the bench. I got out her tablets, and unpacked 6 of them. I knew she only needed 2 at a time, but I wanted to make sure my plan would work. I dropped 4 into the glass of orange juice and stirred it around for a few seconds. Heading back to the table I said “Here you go little sis, drink and tablets.”
“Thanks for being so nice Scott. And thanks for taking me to gym.”
About 15 minutes pasted and I hadn’t seen Lauren, so I decided to go see where she was. I heard a soft noise coming from her room, so I went over to her door and listened. I could hear soft moaning coming from inside. I knew full well what she was doing. My cock instantly got super hard. I had to see this, so I very gently took hold of her door handle and turned. It opened easily and quietly, so I slowly opened the door about an inch. Looking through the gap I could she her lying on her bed with her white leotard pulled to the side and her pushing about 6 inches of a dildo into her tiny young pussy.
I couldn’t have asked for a better view and situation. I was mesmerised by the site of her tiny, tiny little vagina. I was even more excited as I knew this also meant that her young hymen was certainly broken. I watch her as she drove herself into an orgasm over the next 10 minutes. I could feel my pre cum leaking into my underwear, dampening the front of my pants. Lauren finally peaked, whimpering, while biting her lower lips to stay quiet. She shook all over, raising her hips up and down till she blew. She pulled out the dildo and I could see her fluids start to flow out of her slit, but then she took her leotard and pulled the crotch back over herself, covering any further view.