My name is Alex. I am 20 years old and live with my parents and my younger sister Zoe. Zoe is 17 year old. She is the typical girl, slim-body, long black hair, and big brown eyes. We always live as brother and sister, but everything changed during one weekend when our parents went out of town.
It was Friday afternoon. Mom and Dad left for a marriage function in another city. They would be gone for three full days. I was excited to have the house to myself. Zoe was also happy because she could watch movies and sleep late without anyone scolding her.
After our parents left, we ordered pizza and watched a comedy movie together on the couch. We were laughing and throwing jokes like old times. But I started noticing small things about Zoe that I never paid attention to before. The way her t-shirt stretched over her chest, her smooth legs in short shorts, and how she looked so comfortable and beautiful sitting next to me.
Around 11 PM, Zoe said she was feeling sleepy.
“Good night, Alex.”
I went to my room but couldn’t sleep. I kept thinking about her. After an hour, I got up to drink water. When I passed Zoe’s room, I saw her door was slightly open and the light was still on.
I peeked inside. Zoe was lying on her bed wearing a thin white tank top and pink panties. She was reading something on her phone. Her legs were slightly open. I knew it was wrong, but I couldn’t stop looking.
I gently pushed the door.
“Can’t sleep?” I asked softly.
Zoe looked up and smiled. “Yeah. Too much energy today. Come sit.”
I sat on the edge of her bed. We started talking about random things—school, friends, and how free we felt without parents. Slowly the conversation became more personal.
“Alex, what about your girlfriend?” she asked.
“She and I are no longer together,” I replied.
“I broke up with her two months ago. She was too immature.”
There was silence for a moment. The air in the room felt heavy.
Then Zoe said something that surprised me.
“Sometimes I feel lonely at night. You know what I mean?”
I nodded. My throat felt dry. I looked at her face. Her cheeks were slightly red. Without thinking, I moved closer and placed my hand on her leg.
“Zoe… this is wrong,” I whispered.
She didn’t push my hand away. Instead, she looked into my eyes.
“I know. But I have thought about it before.
I couldn’t lie. “Yes. Many times.”
That was all it took. Zoe sat up. We fell back on the bed together. My hands moved under her tank top. Her skin was smooth and hot. I cupped her breasts. They were firm and filled my hands perfectly. I pinched her nipples gently, and she gasped.
“Alex… that feels good,” she whispered.
I removed her tank top. Her breasts were beautiful with light brown nipples. I sucked on them one by one. Zoe held my head and moaned softly. Her body was shaking with excitement.
She pulled off my t-shirt and touched my chest. Her small hands moved down and she rubbed my hard cock over my shorts.
“It’s so hard,” she said with shy surprise.
I stood up and removed my shorts. My cock sprang free. Zoe stared at it for a few seconds, then wrapped her hand around it. She stroked me slowly while looking into my eyes.
I couldn’t wait anymore. I pulled down her pink panties. Her pussy was shaved and already wet. I touched her gently. She was very slippery. I rubbed her clit in circles, and she moaned louder.
I went down and kissed her inner thighs. Then I licked her pussy. Zoe grabbed the bedsheet tightly.
“Oh my god… Alex!” she cried.
I licked her slowly, tasting her sweet juices. I pushed my tongue inside her and sucked on her clit. Within minutes her body tensed and she had her first orgasm. Her thighs pressed against my head as she came.
When she calmed down, she pulled me up and kissed me again.
I positioned myself between her legs. My cock rubbed against her wet pussy. I pushed slowly. She was very tight. Zoe closed her eyes and held my shoulders. Inch by inch I entered her until I was fully inside.
We stayed like that for a moment, just feeling each other. Then I started moving. The feeling was incredible. Zoe’s pussy gripped me tightly.
“Faster, Alex,” she begged.
I increased my speed. The sound of our bodies meeting filled the room. I fucked her harder. She wrapped her legs around my waist and pulled me deeper.
We changed positions. She got on top and fucked me. I loved watching her move. Her long hair fell on my chest as she bounced. I held her hips and helped her.
After some time I turned her on all fours and entered her from behind. This angle felt even deeper. I grabbed her ass and fucked her with strong strokes. Zoe moaned loudly into the pillow.
“I’m going to cum again!” she cried.
I felt her pussy squeeze my cock as she came. That pushed me over the edge. I pulled out and came on her back. Thick streams of cum landed on her smooth skin.
That was only the first night. We had the whole house to ourselves for three days, and we used every moment.
The next morning I woke up with Zoe’s mouth on my cock. She was giving me a blowjob under the blanket. It was the best way to wake up. I came in her mouth, and she swallowed everything with a naughty smile.
We had sex in the shower. I fucked her against the wall while hot water ran over our bodies. Then we did it again after breakfast.
In the evening we watched a movie but couldn’t finish it. We ended up fucking on the couch. This time it was slower and more romantic. I looked into her eyes the whole time.
On the last day, we tried many new things. Zoe wanted to try doggy style again, and then we did the 69 position. She sat on my face while sucking my cock. It was incredibly hot.
We also talked a lot and promised to keep this as our secret.
When our parents returned on Monday evening, we acted normal. But every time Zoe passed me, she would give me a secret smile or brush her hand against mine.
Now, whenever our parents go out, we know what will happen. This forbidden relationship has brought us even closer. It feels wrong to society, but for us it feels right.