I was beyond excited as my step-sister's birthday was just around the corner, and I had been thinking about what to get her for weeks. We had always been close, despite our parents' messy divorce and remarriage. But as we grew older, I started to notice her in a different way - her curves, her smile, and her sparkling eyes. I knew it was wrong, but I couldn't help the way I felt. I decided to get her something special, something that would show her just how much I cared.As I walked into her room, I could see the excitement in her eyes. She was bouncing up and down on the bed, wearing a tiny pair of shorts and a tight tank top. I felt my cock start to harden just looking at her, and I knew I was in trouble. I tried to push the thoughts aside and focus on the gift, but it was no use. She ripped off the wrapping paper to reveal a small, intricately carved box. She opened it to find a beautiful silver necklace, and her eyes lit up. But then she saw the note attached to it - a note that said "meet me in the garage at midnight, come alone".As the night wore on, I couldn't focus on anything except the upcoming meeting. I was pacing back and forth in the garage, my heart racing with anticipation. I heard the door creak open, and she slipped inside, looking around nervously. I took a deep breath and approached her, my cock throbbing with desire. She looked up at me, her eyes sparkling with curiosity, and I knew I was about to cross a line. I grabbed her, pulling her close, and our lips met in a fierce, passionate kiss. She moaned, her pussy dripping with excitement, as I rubbed my cock against her.We were lost in the moment, our bodies pounding against each other, as we devoured each other's mouths. I could feel her cunt trembling beneath me, and I knew she was ready. I lifted her up, placing her on the workbench, and ripped off her shorts. Her pussy was exposed, glistening with moisture, and I couldn't resist. I buried my face in her, licking and sucking her throbbing clit. She was moaning, her body shaking with pleasure, as I brought her to the edge. And then, in one swift motion, I plunged my cock deep into her, making her scream with ecstasy.The sound of her moaning, the feel of her pussy gripping my cock, it was all too much. I was pounding into her, my body trembling with desire, as we both approached the climax. She was cumming, her body convulsing with pleasure, as I erupted deep inside her. I felt my cum shooting out, filling her to the brim, as we both collapsed, exhausted and spent. We lay there, our bodies entwined, as we caught our breath, the only sound the heavy breathing and the distant hum of the garage.As we finally separated, she looked up at me, a sly smile spreading across her face. "Best birthday present ever," she whispered, her eyes sparkling with mischief. I grinned, feeling a mix of guilt and satisfaction. I knew I had crossed a line, but I couldn't help the way I felt. And as we walked out of the garage, hand in hand, I knew that our relationship would never be the same again.
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