My Sister and her Girlfriend

Note : This story is completely fictional!

My name is Hank, and this is what happened to me last year when I was sixteen. It all started when I came home from summer camp. I had been away for six weeks, canoeing, hiking, swimming, the usual stuff. 

When I arrived home, taking a cab from the bus station, I just walked in without knocking on the door or anything, just as if I had been away a few hours instead of many weeks. Later I was glad I did not announce my return home. I had noticed none of our cars were in the drive and assumed no one was home. 
I opened the door quietly, walked in, and looked around. Nobody was there and I did not hear anything. I stepped through the foyer and walked upstairs. When I made my way down the hall to my room, I began to hear some faint noises from my sister's room. Trying to be quiet, I pressed my face against her door and listened for a minute, but could only hear whispering and some giggling. I slowly turned the doorknob and discovered that the door was unlocked. Maybe, I thought, if I suddenly popped the door open, I could catch my sister naked or only in her underwear. What a surprise for her! 

I threw the door open. To my amazement I saw my sister, Cheryl, and her best friend, Diane, lying naked on the bed. My sister was engrossed in sucking on her beautiful girlfriend's breasts. I stood there transfixed by this sight; then I noticed that two fingers were moving in and out of my sister's pussy. These two fifteen year old girls were having sex together! What a vision! Two dark-haired little beauties with slick, curvaceous, and nubile bodies writhing against each other on the bed. 
The opening door and my gasp made enough noise to attract attention to my entry. Diane, lying on her back and facing me, opened her eyes. She froze, but managed to blurt out, "Oh, no!" 
My sister turned about, and I started to step back from the bed. She got her voice back. "Hank, what are you doing here?" 
"I got home a day early, so I took a cab from the station." I stopped moving and just stood there, my astonished eyes taking in the nakedness of the two young girls. I could not see enough. Their bare breasts crowned with perky little nipples were so enticing. Strangely, neither girl tried to conceal her exposed body, and relaxed from the initial surprise. 

"You surprised us, Hank," my sister said rather calmly, considering the situation. Diane whispered something in my sister's ear. 
"I-I'm sorry," I said. "I didn't mean to embarrass you girls." I took another step backwards, knowing I had just lied. 
"Wait!" Cheryl cried. "What's the rush?" 
"I'm so sorry; I seem to be interrupting something," I apologized. Diane sat up and smiled at me. My dreams of seeing her naked had become true. 
"Maybe you would like to join us," Cheryl suggested. 
"Yes, why don't you stay here; a guy would make this more interesting and more fun," Diane added. They both rose from the bed and came over to me. My sister shut the door, but now she locked it. Diane came up to me and pressed her naked body against mine, making me realize for the first time that I had a huge boner. Both girls took my arms and led me over to the bed. 

"Wh-what are w-we g-going to do?" I stuttered, nervous as hell. Here I was with two cute naked girls. If I had planned this, I would have had my wits about me, but the sudden shock of being with them... 
"Isn't he cute," Cheryl said as she unbuttoned my shirt. 
"I have always liked you, Hank," said Diane. She had begun taking off my shorts and briefs. My prick was as hard as iron and sprang free when Dianne pulled my clothes down my legs. I lifted my feet to allow her to pull my shorts off me completely, and she pulled off my sandals too. 
Diane rose and kissed my sister, saying, "Cheryl, I always wanted to do this. Why don't we do what we talked about." My sister turned to me and kissed my lips, her warm, soft tongue parting my lips and slipping deep into my mouth. I began to respond and pressed my tongue against hers. As we enjoyed our incestuous kiss, Dianne moved around behind me so that I was sandwiched between the two lovelies. I could feel Diane's breasts pressing into my back while my sister's soft orbs crushed themselves against my bare chest. 
With my sister still kissing me, Diane rocked back and forth, and I could sense her hard nipples moving across my back. Cheryl started to oscillate her hips against me, trapping and massaging my swollen cock. 

"Let me have him now, Cheryl," Diane said. I broke off my kiss with my sister. Now Diane moved around me and offered her open mouth to mine as my sister moved around behind me. I could not see what Cheryl was doing, but soon I felt a hand softly grasp my penis, forcing its head to rub across Diane's soft belly. 
"Oh god," I groaned, "I'm going to come soon. This is too much." 
My sister let me go. "No! Not yet, Hank," she insisted. "We want to have a little more fun; then you can come." She moved her body up and down, brushing her tits against my back. 
"Yeah, Hank, lie down on the bed. We want to show you something," Diane said as she pushed me backwards. I felt the bed on the back of my legs and sat down. Diane pushed me back and Cheryl lifted my legs, swinging them onto the bed. 

"What are you going to do?" I asked. 
"You'll see, my sister promised. She pushed my legs apart and knelt between them. Diane climbed onto the bed and straddled my chest. Looking up, I could see her cunt inches from my face. The bald outer pussy lips were parted, allowing soft pink inner folds to emerge. Diane's pussy looked moist and tender. 
"Lick my cunnie, Hank," Diane urged and edged forward. "Please, baby, it will make me feel so good." I lifted my head and pressed my mouth against her sweet pussy, giving it a little kiss. "Oh, yes," Diane whispered. I wiggled my tongue between her labia as my Diane slowly rubbed her bare twat against my face, bathing me in her vaginal secretions. I felt a hand on my cock. It was my sister giving my hard member a little good feeling to encourage my cunt licking. 
"That's right, brother dear," she said, "Give Diane a good time." 

Admittedly, my first ever experience in eating pussy was rather exciting and enjoyable. My mouth was too full to say anything, but I had never tasted anything so stimulating. Diane began to move her slim pelvis faster, and I licked and kissed harder to keep up with her. Suddenly, she pressed her cunt against my face, almost suffocating me. 
"Oh Jesus! Oh sweet Jesus!" Diane cried out. "He eats pussy better than you, Cheryl. He's so good!" I could just barely hear this compliment, locked between her firm, tensed thighs, but I felt proud of my achievement. 

Diane relaxed after a few minutes and slid away from my face. She moved down my body until her cunt was poised above my hard, and now, aching, cock. "Push him into me, Cheryl," she begged. "I want to feel him in me." I felt my sister guiding my cock into her friend's cunt. Diane lowered herself slowly, and my cock slipped deep into her slippery vagina. She moaned softly as I slid in. 
"Don't let him come inside you, Diane!" my sister cried out. 
"Just for a minute," Diane mumbled. "I have to feel him in me just for a little while. I need it." I looked at her head lolling from side to side, her eyes pressed shut, her mouth open, little gasps emerging. 
"I need to come," I moaned. "I really need to come." 

Reluctantly, Diane lifted herself from me. I could see my cock shining with her slick juices. Kneeling on the floor, she leaned over my cock. She gripped it with her little hand. Suddenly, her head dropped down, and her mouth engulfed the purple head of my engorged dick. I could feel her tongue swirling around my penis as more of it disappeared into Diane's mouth. Her lips stretched about the circumference of my hard cock. 
"Ohhhhhh!" I groaned, feeling my spunk welling up, "I'm going to come... ohhhh... right... now!" Diane pulled her mouth off my cock and pumped it with both her little hands. My sister pushed her face over me with her mouth open in her anticipation of the fountain of sperm about to emerge. The first strand of my semen splattered against her cheek. Cheryl moved her head and caught the next warm jet of sperm in her mouth. Diane pumped and Cheryl caught my load of cream in her mouth. Soon only a small amount bubbled out the end of my dick, and Diane intruded her head and wrapped her lips about my cock, sucking out the last drops. 

Meanwhile, I watched in amazement as my sister played with her mouthload of semen and gathered in the drops from her face. Diane rose from my withering penis and kissed my sister. I could see by the cum dribbling from their parted lips that they were sharing my sperm, tasting and savoring it in their youthful mouths. When the kiss broke, I saw that both had some of my cum drops on their chins and boobs. They grinned at me while the collected these drops and fed them to each other. Diane and Cheryl sucked every last drop of semen and then kissed each other, removing the last traces of cream from their lips. 

"Hank, lover boy, I think that you should give your sister a break now," Diane urged as she guided Cheryl to kneel over me. My sister smiled expectantly as she crept forward on her knees until her cunt was hovering above my mouth. 
"I need you now, dear brother," my sister whispered hoarsely. 
As she moved farther, I lifted my face to her moist pussy, and began to give her the oral satisfaction she desired. Now Diane began to play with my limp penis while I licked my sister's dripping snatch. Cheryl was trembling with her excitement, and I did not need to eat her pussy long for her to begin to roll her hips over my face. I could hardly hear the groans and gasps with my ears muffled by my sister's warm thighs, but I knew that I was about to bring her to her incestuous orgasm with my busy mouth. Meanwhile, I felt my cock slip into something warm, wet, and I knew that Diane's mouth had started sucking my cock to get me hard again. 
"Ohhhhh! Ohhhhhh... Yeah!" my sister moaned as she thrust her pussy tight against my face. "Yeahhhh! YEAHHH!" Her body shook with her orgasm. Once more I was almost smothered by wet pussy, but I didn't care. 

Listening to my sister cry out, I felt my soft dick begin to swell again as Diane fingered and sucked it to hardness. When my sister had relaxed from her climax, my pecker was proudly upright. 
"Come on, Cheryl," Diane urged, "Put his cock inside you. It feels sooooo good; you'll see!" My sister moved her hips down my body and soon my cock head was touching her set cunt. As Cheryl wiggled her ass, Diane fed my raging erection up into my sister's drenched pussy. I had often dreamed about this illicit moment. My sister's youthful body hovered over my penis and pressed wet cunt lips against my cock. Cheryl looked down at me and smiled. Diane grabbed my dick as Cheryl straddled it and slowly lowered herself, impaling her belly on my hard dick. 
Just knowing that it was my sister's cunt now wrapped around my penis was extremely exciting. My cockhead deep in her soaking pussy, she slowly lowered herself. God, I thought, she's so warm and so tight. Her wet pussy had taken me in entirely, and she sat there looking at me and enjoying the sensations of my throbbing cock buried in her cunt. I reached down and grabbed her hips, and my sister slowly started moving up and down, moaning from her pleasure. 
"Just for a little while, Hank," she sighed. "I need to feel this so much. I need to feel your hard cock in me too." 
"Be careful, Cheryl sweetie," cautioned Diane. "Don't let Hank fill you with his thick cum." 
"I would like that," my sister whispered softly. "I would like him to fill me with his fertile semen and feel his baby growing in me... but... I know that I can't do that... at least, not now." After rocking back and forth on me for a minute or two, Cheryl lifted herself up and lay down next to me. I put my arm around her and began to kiss her. 

I forgot about Diane for a moment, but I felt her mouth absorb my cock with its film of pussy juice from my sister's cunt. I looked down at her wanton face, watching as she fellated me. I could hear Diane's moaning as she sucked my cock, apparently enjoying her lewd task. My sister kissed me; our tongues churned against each other as Diane sucked my cock. Then Cheryl sat up and joined Diane. My cock was in one mouth and then the other, or sometimes trapped between both. 
With both lovely girls working on my prick, a geyser of semen soon emerged from my shuddering body. I groaned, overcome by the lascivious pleasure, as my sister and her friend strove to collect and swallow my rich cum. 

Finally relaxing together, we lay on my sister's bed. I discovered that my parents were not going to return home until tomorrow and had allowed Cheryl to have her best friend stay over with her to keep her company. Now all three of us had hours of fun that afternoon and evening. I learned many things that night and the three of us maintained that close companionship since then, and, hopefully, will continue for many years in our future.