I kissed her deeply, our tongues flicking and darting in and out of each others mouths. She suddenly pushed back away from me and dove under the water, I felt the sudden warmth of her hot mouth as she engulfed me, she took almost all of my 8 inches down her throat. I looked over at my siblings, and could tell they were in various stages of sexual play, God help us all if Pa were to walk into the clearing right now.
Rosemary came up for air, I pulled her to me and kissed her again, "Take your clothes off, please, Rosemary, I want to feel your skin on mine." She pulled and tugged, and finally got her dress and under clothes off, and swam over to the rocks that the rest of our clothes were drying on. My cock grew another inch as I watched the sexy ass of my younger sister emerge and I thought I'd choke when she turned, her pussy had hardly any hair on it, just a few wisps at the top of her slit.
Her clit was poking out from between her soft lips, I wondered why I'd never noticed this raving beauty before. She dove into the water, I started to worry when she didn't come up for air after a few seconds. Suddenly, I felt her hands on my hips, they slid down to my ass cheeks and she spread them apart, I felt something I'd never felt before, her hot tongue probing my asshole, I leaned forward to grant her easier and more access to the forbidden hole. She swam between my legs, gently nipped the head of my dick and came up for air. Smiling like the Imp she was, "Did you like that Peter?"
"Rosemary, never in my life has anyone ever done that to me. It was great." I told her. She beamed with delight and swam up to me, wrapping her legs around my waist, my cock went in an almost natural position into her pussy, she moved and wiggled till she had my whole length buried deep into her hot tight cunt. "I'll do anything for you Peter, you can do anything you want to me too, I don't care, as long as it makes you happy, I'm happy."
She breathed. "Your incredible baby sister, I wish that you weren't my sister so we could live as husband and wife." I told her quietly. With a look of surprise on her face she exclaimed, "REALLY?" I leaned to her and kissed her to confirm what I'd said. We'll have to be careful so Pa don't catch us, I can't stand another thrashing like he gave me before.
Rosemary ran her fingers down my back, feeling the scars. Tears welled in her eyes, she started to say something but I put my finger to her lips and shook my head. I started to pump in and out of her tight pussy, she rolled her eyes up and closed, relishing the feeling of finally having her oldest brother buried in her. Wrapping her arms tightly around my neck, I could feel her pussy squeezing me tight as she came quietly, the warmth rushing from her pussy around my balls in the cold water, told me she'd came, reaching down, I pulled her ass into me hard, buried deep into her I shot my seed, I came harder than I'd ever came in my life.
Kissing me softly on the cheek, she whispered, "Thank you Pete." Not waiting for a response, she pulled off of me and swam off towards the others. I couldn't believe I'd just came in my sister, I was in heaven. I swam to the edge of the stream and gathered my clothes and started back towards the wagon. I could hear the giggles of my sisters as they started teasing my brothers. Smiling, I continued on back to camp. I paused only long enough to pull my clothes on, I stepped out from between the trees and saw Patty bent over the cook fire tending a pot of food.