We struggled and writhed, laughing hard, until I had one of her hands held away and she had mine firmly so we couldn’t tickle each other any longer. We gasped and laughed together and looked at each other happily. Panting as we smiled, we quickly realized the state we were in, with her naked chest pressed against my erection. We continued smiling at each other, but for a different reason now.
She worked up the courage to say, “If you want, you can go ahead…”
I was hesitant, but my dick was throbbing. “Are you sure?”
She raised her eyebrows and nodded excitedly.
“Are you really sure?” I asked again.
Looking me straight in the eye and biting her lip, she said, “Please?”
Gently, I released her arm and placed my hand on her shoulder. She let go of my other hand and wrapped her arms around me. I raised my groin to press my penis against her. Her arms wrapped tighter and she rested her head on my chest. I pushed my dick up again, sliding it between her breasts. It was hard to register that I could feel her breasts against me. They were so soft!
I drew back and slid up again. Our bodies were perspiring. Her hands held to me tightly. I pushed again. With each stroke, I began to feel the edge of my boxers coming down. I didn’t care at that point and continued my gentle thrusts. I could feel the tip of my penis emerge from the fabric. It was now against her skin. My precum and her sweat made the flesh so slippery. I pushed against her again. Sara was breathing hard. Really hard. She was so hot, so wet with sweat. Her hair was clinging to both our bodies as we embraced. Her hot breath spilled over my chest. I felt her lips tighten and kiss me once, and then again. As I pushed my erection between her breasts she gave in and hungrily began kissing my chest, gasping and quietly moaning into me.
I cradled her head and ran my fingers through her hair. I heard her whimper. It was too much.
… I felt it building, throbbing… felt the throbbing pressure grow stronger and stronger… I held it… I held on… she whimpered again… it kept building… I held her tight… clutched her head to my chest… she kissed me again and whimpered, “Cum on me…”.
I burst! My cum boiled out and shot between us in strong gushes, drenching our skin with semen. She moaned and rubbed her chest up and down against me as my penis pulsed and shot my seed onto her. I groaned with each shot, holding her tightly. Cum had splashed up onto my chest and on her neck, slid down between my legs and dribbled down her belly. Streaks of my semen covered us both as we panted and writhed together.
Sara was gasping, trembling. Without warning, she turned her head in and started kissing my chest again hungrily. I felt her grab her breasts again and felt her kneading them in her hands as her lips crawled over my wet skin, working down. When her chin bumped the wet tip of my still-engorged penis, she quickly jerked her head back up, exhaled, and kissed my chest once more.
Sara opened her eyes and looked up at me. I could only admire the sight she was: her hair was all wet, her forehead glistening, holding her cum-splashed breasts in her hands.
We smiled at each other. It was a smile that said we both knew we should stop, but wanted more. I slipped the band of my boxers back up to cover myself and she turned around and picked her bra up off the floor. I grabbed a few tissues from a box on my desk and gave them to her and she cleaned herself off, facing away, then got her bra and shirt back on.
I went and sat on my bed and she sat with me for a moment. We just sat in silence for a little bit, enjoying the intimacy. Eventually she stood, stretched and gave me a hug. Giving me a smile over her shoulder, she left my room and shut the door after herself.
My sister’s regular attention to my physical needs was really improving my overall mood – the depression I was in prior to that Thursday night had lifted now that we had talked about things a little more and I knew Sara didn’t feel manipulated or taken advantage of. However my desire still ran pretty high. Tanya was still a huge turn-on at school and it was hard not to come home and immediately want to masturbate thinking about her full breasts and the way she smiled after a joke. It hadn’t helped that she was wearing such awesome jeans on Tuesday, or the low-collar black top she wore the next day. I was just doing my best to try not to obsess over her and instead enjoy working closely with her on our projects and be happy with that, so that I wouldn’t let my thoughts about her influence my thoughts about Sara. I really respected my sister and wanted to be as true to her as possible.
Which wasn’t easy. But I was trying.
As a result the last week overall with Sara had been really nice. Despite everything else going on in our lives, we were making an effort to spend more time together, enjoying each other’s company. We had even spontaneously gone to see a movie together, something we hadn’t done in a couple of years. It was just nice to have someone at home who you knew cared for you. Not that we didn’t before, but we were becoming more affectionate with one another. We were a lot closer now – and not just physically.
So when another Friday evening came, though I really wanted to ask her to be with me so I could masturbate, instead I opted to just enjoy watching one of her favorite movies with her. And when it had finished and she had fallen asleep I helped her to her room to put her to bed. She hadn’t minded me being in the room while she slipped into her pajamas, though she made me look away for a moment. And I tucked her in, and kissed her on the forehead before leaving.