"Mmm," I moaned softly. I felt so warm and comfortable as I peed in my diaper. I leaned back a little, letting my diaper absorb my urine. I loved peeing in my diaper. I just felt so naughty and grown up.
My hands rested on my belly, and I rubbed gently circles. I was so relaxed that I started to sway slowly in the tree house, moving my hips in time with the rubbing rhythm.
It felt a pleasure to have my hands on my tummy, and I could feel my pussy growing wetter and wetter.
I enjoyed my own body, and it felt so nice to let go and have fun.
"Oh, yes!" I moaned as I slipped a hand inside the diaper and rubbed my pussy. The warm pee made me feel really energized.
I could feel the softness of my wet glistening pussy gliding between my fingers as I masturbated, and I felt my tummy flutter as well. I didn't even have to touch myself down there anymore. My body knew what to do!
I hurriedly pulled my finger out of the diaper, and pulled the diaper off me, letting it fall to the tree house floor.
I reached down and picked up the diaper and rubbed the wet side over my nose and inhaled the intoxicating scent of my pee. I stuck two fingers into my mouth and sucked them, getting them moist and wet with my saliva. I then put them in my pussy and rubbed my clit.
I love being dirty and naughty!
I couldn't help but giggle as I fingered my pussy, my body full of life and energy right now.
"Oh, God," I moaned as I came. My whole body tingled and shaken from my orgasm, and it took me a few moments to recover. I was still trembling when I felt something moving next to me in the tree house.
"Naughty little sister!" I heard my brother say as he walked up to me.
"Oh, no!" I gasped. I had forgotten to lock the tree house! My brother would catch me doing some pretty kinky stuff if he saw me naked!
But then he put his finger to his lips, shushing me quietly. "I won't tell mom," he whispered. "I promise. But you have to spread them legs for me baby sis." He started laughing when he saw my expression.
"What?" I asked incredulously. I was surprised to hear my brother say that.
"You heard me?" He said as he jumped out of his clothes and lay down next to me. He pushed my legs apart so that my thighs remained open, and then he got on top of me.
He looked at me and said, "Come on, what's wrong with a big brother wanting a little sister? Besides, it's your fault for being such a horny bitch?"
I felt his dick press into me as he spoke, and it immediately made me wet between my legs.
He ran his tongue over my skin from my neck down to my belly. Then he licked his tongue up my thigh and over my pussy. I felt my body tremble, and I pressed my thighs together tightly as he lapped at my folds.
"No, you can't have that!" I whimpered. It felt too good!
"You want me to tell mom?" he teased, and he suddenly stopped licking me, standing up above me.
I gasped as I felt him pull my legs up and open them wide again. He moved in between them and knelt down over my spread legs, staring down at me. His eyes looked so intense as he looked at me.
He leaned forward, pressing the top of his head against my entrance, and then pushed forward.
I gasped as his cock head slipped inside me giving me a sharp pain as he slid all the way inside me.
The moment I felt him fill me completely and rob me of my virginity, I cried out. My eyes flew open in surprise, but it was too late.
My brother saw me staring at him and smirked. "You're not used to this yet, are you baby sis?" He said as he pulled out slowly and pushed back in.
I groaned as he pushed himself back in, and then slid out again. He repeated this action several times, letting me get used to him inside me.
He slid all the way out of me and then pushed back inside, all the way to his balls, filling me to the brim again. He pumped his cock in and out of my pussy, holding my legs up in the air as he fucked me with long, deep strokes.
I was so sensitive after having an orgasm just a few minutes ago that I was already on the edge again. This was because he started fucking me. Soon, I found myself coming again, just from his cock moving inside my pussy.
He grabbed my used diaper and pressed it against my face as he continued fucking me, covering my nose with my pee-soaked diaper.
I began to laugh and squirm underneath him, feeling the wetness of pee around my mouth and on my face. It was so naughty and funny to be covered in pee while getting fucked.
My brother was having a blast fucking me. I could tell by the look in his eyes and his tone of voice that he was enjoying it just as much as I was.
My body was feeling full, so full of his cock that I couldn't even think straight. All I could do was moan as he fucked me, his long shaft filling me completely time and time again.
"You're such a little slut, aren't you?" He asked as he leaned forward and spat a thick glob of spit on my face, making me gag slightly from the taste of pee mixed with his spit.
He pushed his dick into me as far as it would go before pulling back again. He did this over and over again until he was slamming into me as hard as he could, hitting me right on the spot.
My body tensed up as he slammed into me harder than ever before, making me cry out loud. "Oooh!" I moaned out loud as he pounded into me over and over again, making sure that I could feel everything that he was doing inside me.
"That's it, little sister," he said. "Come on."
I felt his dick pulsing inside me as he spoke, and then I felt a rush of warm liquid pouring from my pussy. My brother was spilling his load inside me, and it felt amazing! It was like every drop of cum in his balls was being released at once, and it felt incredible.
I could feel it dripping out of me and onto the floor of the tree house.
After a few moments he slid out of me, and then he got dressed.
"Wow!" he said in amazement. "You made me come so hard!" He walked over to where I was lying naked and picked up my soaking wet diaper and brought it to his nose.
He sniffed at it for a moment, "Mmm... this smells like you. You were such a naughty little sister." He smirked at me as he threw the diaper back at me and left.
From that moment on, I had an incredibly naughty side to me. I loved being dirty and getting fucked by my brother.
The end.