She quietly laughed and turned around, being as quiet as possible, and she shut my bedroom door and locked it behind her. Turning back to me, she pursed her lips and took a few steps toward me like an underwear model walking a runway. Her purple towel wrapped around her head, she stood and stretched her left leg out to the side and posed before me. Untying her front knot, she reached inside her robe with both hands and suddenly the robe was wide open, revealing her young naked figure. Tara stood proudly in front of me looking down. I in my chair looking up at her, I craned my neck to the side, examining her short but surprisingly skinny pale body. Her wider than the rest hips shifted and she threw down the white robe behind her. She put her hips on her waist and shifted her hips back to the right. Looking down at me like I was somehow supposed to critique her style. Which I admit was very good.
For a minute or two I gazed up and down, slouched back in my chair. Her pale pussy was newly shaven, possibly for me, and I could see her clit poking through just a little over the gap in her thighs. I looked up toward her nice breasts.
Hands on her waist, they were perfectly formed and glowed for me in the light of my dim bedroom lamp. I looked at her eyes and we both smiled.
"You like?" she said, like some sort of Asian masseuse.
"Uh-huh.." I nodded, jaw dropped.
"You want me on top of you?"
I laughed hard and bent forward. She laughed too and hunched covering herself with her arms. She turned around and snatched up the robe. She threw it over her shoulders, covering up again, and she stepped toward me. She lightly kicked my right thigh and stood over me looking down. I gazed up into her eyes and I closed my legs, allowing her to step around either side of me and lower herself down onto my lap. I raised my index finger to my lips, gesturing for her to be quiet, as our parents were still awake downstairs.
"I know," she said, now sitting on my lap facing me, "I'll be quiet."
Her white robe was still closed as she raised her arms and rested them on my shoulders. I grabbed the chair arms and propped us both up a little higher. Doing so caused my sister to hug my waist more with her thighs and scoot up, digging her naked pussy in a little overtop of my pajama pants. I raised my arms a little, and slowly felt up her legs, over the robe, and closed my hands around the top of her waist. We both stared into each other for a moment.
"I think you're good looking," she said to me in a quiet voice.
"Oh yeah?"
She nodded, her hair still wrapped in a towel.
"I, like..." she continued, "Wanted to do that for a while."
"Really?" I smiled, "Since when?"
"Hmmm, well..." she looked up, pondering, "A little while ago.. we were both in the pool, and we were playing Keep-Away..."
I immediately knew what day she meant. It was summer and we were both in the pool in our backyard. I was holding up a football out of Tara's reach and she was trying to grab it from me. She was wearing a small yellow two-piece that I can remember like it was yesterday.
"...And you wouldn't give me the ball, so I jumped on you and wrapped myself around you, and you got a boner."
"I what??" I rebuttled, "I certainly did not!"
"Yes you did!" Tara laughed, "I could totally feel it, and you wanted me to get off, and I wrapped my legs around you tighter.."
As she said this, she actually did wrap her legs a bit tighter around me as I listened to her regale our pool story.
"And I had you against the wall and hugged you real close.."
"And I totally looked down at your boobs," I cut in.
"You did!" she laughed and bounced on me a little, "And you got even harder, so you turned around and jumped out onto the deck, and you covered your boner with your hands and sat on the beach chair."
"Haha," I laughed, gripping her waist a bit tighter, "I can't believe you remember that."
"And then," she continued, leaning back a little, "I got out too, and I stood overtop of you.."
"And then mom and dad came out," I finished, "And ruined all the fun."
"Yep," Tara frowned, "They always ruin everything."
"Sure do," I said.
Tara looked at me, then she leaned in close and put her face next to mine.
"But ya know," she whispered in my ear, "I did lock the door..."
She rocked her hips once, slowly over mine and she breathed into my ear.
"We can't," I whispered back, "Not right now."
She rocked her hips again and touched her lips to my ear, breathing again.
"We'll be quiet" she whispered, grinding on me again, "We can just pretend."
My cock began to swell under her movements. She sat up straight on top of me and her robe opened a little, exposing her chest and belly button. She took my arms in her hands, looking at me, and guided them inside her robe, exposing some more of her body. She placed my hands on her naked waist and her grinding motions sped up a little. My cock swelled a bit more as she put her hands back on my shoulders. Looking into each others eyes, we slowly and quietly dry humped. Tara on my lap, robe draped open. My hands on her waist, squeezing a little with each gentle thrust of her hips. I thrust my hardening cock up a little, and I knew she felt it because her mouth opened and her breath skipped a beat.
She leaned back and began swirling her hips around on top of me, making me harder. She brought her hands up to the towel around her head and brushed it back, letting the towel drop to the floor and her damp blonde hair fell around her shoulders. Her robe opened up more, exposing her breasts, and as she lowered her arms from my shoulders, she let the robe fall to the floor. Now naked on top of me, she grabbed each arm of the chair and grinded her hips into me even harder. With my hands on her waist, I pulled her in closer toward me while thrusting upward. I could feel her warm pussy on my hard cock through my pajama pants.
"That feels good," I whispered to her, through short hard breaths.
"Yeah.." she sighed, and she grinded even harder.