As usual, all characters in this story are eighteen or older.
The evening air was clear and warm. It was a perfect night to dig out my telescope and study the stars. I hastily set up my tent and then packed my eight inch reflector out into the back yard. We lived far out in the country, away from light pollution. These kinds of nights were perfect for amateur astronomers.
I was alone in the big ranch house. Dad had left eight years ago, overcome by too much drink and a lust for bar girls. Mom was attending a cattle convention in Kansas City and my younger sister was out on a date. I would have the whole evening to myself. Like a futuristic astronaut, I had to decide on interstellar travel or staying in the solar system. I decided on the solar system and soon Jupiter swung into view. Jupiter always fascinated me. It was so big and had so many moons!
I was making notes on the Jupiter's southern hemisphere when I heard the back door slide open.
"Nancy?" I called.
It wasn't time for her to be home. Damn! Now my whole evening would be shot. She wandered out to my setup and plopped down beside me. I could tell that she had been crying.
"What happened?" I asked. "I thought you had a date with Rodney Bloom."
"I did," she sniffled, "but when we got to the drive in all he wanted to do was try to fuck me. I couldn't handle it so I made him bring me home. What's wrong with me? Why can't I be like other girls? They all let their boyfriends fuck them."
I knew she was really upset because she never said 'fuck' around me. She leaned into me and I put my arm around her. I could feel her tears soaking through my t-shirt.
"There isn't anything wrong with you baby girl. You just have a higher set of moral values than your slutty friends."
"Oh yeah? Well maybe I need to get a little slutty too," she whined.
"No sis, no. You should stay just as sweet as you are. Don't compromise your morals just because some dickhead let his hormones get out of control."
I tilted her head up and gently kissed her lips. She looked at me strangely, like I had done something she really liked. But I often kissed her. I loved her. I didn't do any of that French stuff, just a light brushing of her lips to show her I cared.
She grabbed the back of my head and looked into my eyes.
"I've been sweet long enough! I want to be really bad. I can't think of doing anything as bad as making love to my brother," she declared.
I backed away from her. She couldn't be serious! There was no way I was gonna fuck my sister!
"Don't get carried away sis. You don't have to jump me just to get even with the world," I declared.
She jumped up and ran back to the house. "We'll see about that!" she yelled as she disappeared through the back door.
I was thoroughly confused. Why would she turn down her hunk boyfriend and offer herself to me? I'm no hunk. I'm just an average looking math nerd with glasses, not to mention her brother. She, on the other hand, was a genuinely beautiful girl. She had long, straight red hair that spilled over a killer body. Big tits and flaring hips showed that she would be someone's prize catch. But not mine! She was my sister!
I thought she had gone to bed so I returned to my telescope. Just as I tweaked in on the great red spot, I heard the backdoor open again. She strode purposefully over to where I was reclining on my blanket. All she had on was a sheer negligee and a pair of sheer panties. Her outfit left nothing to the imagination. She slid in next to me and curled her arms around me forcing me onto my back. Her lips touched mine and this time they were open.
I was astonished and when I tried to protest her tongue shot into my mouth like a striking snake. My protest died in my throat. Her hand grasped my cock through the thin cotton shorts. It got immediately hard.
"Nancy, what are you doing?" I gasped.
"You have had girlfriends, haven't you?"
"Well yeah."
"You made love to them, didn't you?"
"Yeah."
"I want you to give me some lessons. I'm tired of being Miss Goody Two Shoes. Teach me to fuck! I don't want a lecture course; I want a full, physical participation course."
"Nancy you are my sister and while I just know that making love to you would be fantastic, I can't do it."
"Sure you can. I'll help get us started and you can take over from there," she sighed.
Her hand pumped my rigid cock through my shorts. I was quickly losing control. I gave it one last try.
"Please, Nancy, think about what you're doing. You'll meet some nice young guy pretty soon who'll make you happy. Don't throw your innocence away on your brother," I pled.
"My trouble is that I think too much. This is gonna happen unless you beat me up. I want you inside me. I want it now!"
At that point, brain number one winked out and brain number two woke up. My resistance fled. My cock was driving now.
She jerked my shorts off, exposing my eight inch dick to the evening air. It stuck out like a lance. Her hand wrapped around it and her lips brushed the tip. She smiled up at me.
"Where did you learn this stuff?" I asked in a panicky voice.
"The internet knows all," she answered.
She sucked the tip of my cock into her mouth and tongued the hole in the end. I almost shot off right then! She took my cock out of her mouth and took off all her clothes (both pieces). Her body was magnificent. I had dreamed about females like her. I was salivating. I rolled her onto her back and spread her legs.
"Are you gonna fuck me now?" her trembling voice inquired.
"I'm gonna lick you now. I'm gonna eat your pussy, suck on your clit and make you cum on my tongue."
She shuddered as my lips touched her pussy. It was sweet and fresh. Her slit was already wet. I licked her from her asshole to her clit. My tongue sought her center and I jammed it into her vagina as far as I could.
"Oh god, Al, don't stop. Lick me harder."
I rubbed her sex as fast as I could with my tongue. She was leaking a lot of girl juice and I was lapping it all up. Her body humped off the blanket as she was introduced to feelings she hadn't known existed. That's when I grabbed her clit with my lips. I sucked on the hard little bud like a tiny dick and rapidly ran my tongue over the end of it. I gave it a gentle little nip. She screamed and came almost immediately. Her juices dribbled down my chin. I kept up the assault on her clit until she came again.
"Does it get any better than that? She whispered.
"Yes, my love, it does," I whispered back and crawled up between her creamy thighs.
"Are you gonna fuck me now?" she asked.
"Yes, this is it."
"I'm ready for it now. I can't wait to feel you inside me."
She aligned my cock with her entrance and rubbed it in her pussy juice. Soon it was slick and ready. I plunged into her, breaking her cherry and gliding in all the way in one stroke.
"Oweee!" she cried. "It hurts! Take it out."
A big, fat tear rolled down her cheek.
"No way. I'll just let you rest for a minute. It'll start to feel good in just a little while."
I kept still within her until I felt her move a little. She moved a little more.