The following evening found Margo and Nikki home alone. The two sisters sat together on the sofa in the living room, watching television. The Andrews had cable television and when a particularly erotic scene suddenly came on the set, involving several young men and women in an orgy, Nikki blushed and looked away. Margo saw her sister's discomfort and she laughed.
"You're such a baby! You're still a virgin, aren't you, Sis?" the older girl asked teasingly.
"Yeah, I am. So what?" Nikki asked defiantly.
"So I think it's about time that you branched out a little, Nikki. I mean I love making it with you, you know that, but you can't just keep making it with girls for the rest of your life," Margo said.
"I know," Nikki said, blushing again and unable to meet her sister's penetrating gaze. "But I took a big step last night."
"Oh, yeah? What did you do?" Margo asked with interest.
"I spied on Mom and Dad while they were, uh, fucking," she said softly.
"Wow! You didn't really?" Margo asked, feeling her pussy growing damp.
"Yeah, I really did!" Nikki said.
"And then I played with myself for a really long time and I had a huge orgasm!" Nikki said proudly.
"Hey, that's neat!" Margo said, nodding her head in approval.
"It felt really good," Nikki murmured.
"As good as when I touch your pussy?" Margo asked, her eyes lighting up.
"No… I like it better when you do it with me," Nikki said, blushing again.
Margo laughed delightedly. "I'm so fucking horny right now! How about you?" Margo asked thickly.
"Yeah… I'm pretty horny too," Nikki admitted.
The thought of her older sister eating her pussy and making her come with her tongue had the girl panting and flushing all over with sexual excitement.
Margo laughed again, seeing her sister's obvious horniness.
"Come on. Let's go to your room and get it on," Margo said, reaching out and taking the other girl's hand.
"Mmmmm, my pussy's getting all hot and juicy just thinking about making it with you, Sis," Nikki said excitedly as they made their way to the girl's room.
"Yeah, incest is great!" Margo said as she closed the bedroom door behind them.
The two horny girls fell into each other's arms as they stood near the foot of Nikki's bed. Margo could feel her sister shivering with desire in her arms. The two teenagers explored the insides of each other's mouth thoroughly with their horny tongues. Then, as they broke off their torrid tongue-kiss, both girls panting heavily, Margo began to kiss and lick the sides of the girl's neck.
"Mmmm," Nikki moaned as she felt her sister's mouth and tongue running up and down her flesh, all the way from her shoulder to the base of her ear.
Margo licked and bit and kissed and finally flicked the tip of her tongue lightly back and forth across Nikki's earlobe. Then she explored the inside of the girl's ear with her tongue, making Nikki shudder and groan with a swiftly rising fuck-lust.
With a little moan, Margo pulled away and quickly removed her clothes, urging her sister to do the same. When both of the girls, were completely naked, Margo lay down on the bed.
Nikki joined her big sister on the bed and began to kiss the older girl's neck just as had been done for her. She kissed Margo's neck, throat, and lips, working her way down to the pair of big tits that seemed to be beckoning to her.
"Ohhh, yeah, honey, kiss my tits!" Margo cried.
With a little squeal of excitement, Nikki kissed her sister's left tit for long moments. She kissed with tight little wet circles, moving in closer and closer to the nipple that seemed to be stiffening and enlarging before her very eyes. Nikki parted her lips and stuck her tongue out, placing its tip directly on the pulsing nipple. She flicked back and forth for a few minutes, making the other girl writhe on the bed and cry out her pleasure.
Nikki licked across Margo's nipple with the flat part of her teasing tongue. Then she pulled away and blew a stream of cool air onto the nipple.
"Suck it, you bitch!" Margo screamed, beside herself with desire.
Nikki grinned, glad that she had been able to arouse her big sister to such a fever pitch. Then she took the girl's nipple into her mouth and began to suck it hard.
"Yessssss!" Margo yelped as she felt her sister licking and sucking her nipple at the same time.
Nikki moved her mouth back and forth from tit to tit, kissing, licking, sucking, nibbling on the twin peaks of stiff nipple-flesh.
"Oh, God, that's good," Margo moaned.
Nikki began to kiss her way down the older girl's flat belly. Then she lay on her own belly between Margo's legs as she kissed and licked and nibbled on the older girl's inner thighs.
"Awww, shit, eat meeee! Eat my cunt until I come!" Margo cried hornily.
Nikki poked her tongue against the base of her sister's drooling cunt. She put her fingers on the sides of plump pussy, pulling the swollen cuntlips very far apart.
"Ohhhhh, Margo, your pussy is soooo beautiful," Nikki whined, thinking that the fully exposed cuntflesh resembled a slab of raw meat – very tasty meat.
"Just eat meeee!" Margo demanded, her eyes filling with tears as she turned on more and more.
"Okay, Sis, take it easy. I want it bad, too," Nikki giggled, and then she began to run her tongue up and down the swollen cuntlips.
As she licked her sister's cunt, Nikki could see more and more thick pussyjuice filling Margo's cunt and she moaned softly, thinking of the delicious treat in store for her.
Nikki licked the sides of Margo's clit. She moaned again as she felt the nub of clit-flesh throbbing against her lewdly licking tongue. The girl lashed at the pulsing clit with her tongue.
"Awwww, shiiiit, that feels soooo fuckin' good, Sis. Keep it up! Keep licking my clit!" Margo wailed, half out of her mind with lust.
Nikki slipped her hands beneath her sister's legs, lifted them up and licked and bit at her trembling asscheeks. She pulled the older girl's asscheeks apart and rimmed the tight asshole until it was all clean and shiny.
"Ohhhh, Christ!" Margo yelped, wondering how much longer she would be able to stand it before she would have to come.
Nikki expertly moved her tongue back to Margo's cunt and eagerly and hungrily licked the throbbing lips, sucking on the thick hairs growing there. She shoved her tongue between Margo's pussylips and pushed deep inside, tilting her head a bit to one side so as not to touch the older girl's clit; not just yet anyway. Nikki wanted to make her sister wait for her orgasm.
Every single muscle in Margo's body was tensed now as she bucked up and down hard on the bed, turning on more and more, her hands clawing at her own tits. The older girl could feel her clit sheath being peeled upward, away from the fiery bulb of raw nerve-flesh.
Suddenly, Nikki licked up and down the trembling clit as hard as she could several times and then she stopped.
"Ohhh, God, why'd you stop! I coulda come, you bitch!" Margo whimpered, but she knew why her sister was doing this to her for she, herself, had done the same thing to Nikki many, many tines, teaching the girl that the longer you had to wait for an orgasm, the more powerful it was.
Margo bucked her loins upward, mashing her cunt snugly against her sister's hot, hungry mouth. Nikki could tell that her big sister was in no mood to be teased any longer. She knew that she would have to let the older grl come soon or she would be in real, danger of losing her mind. Nikki had heard about that happening and she didn't want that to happen to her own sister.
"Ohhh, yesss, honey, yesss," Margo sighed as she felt Nikki's tongue stroking her clit once again, not stopping this time.
Nikki licked up and down the length of the trembling bud over and over again and then, as she felt the beginning of her sister's orgasm, she wrapped her lips tightly about the base of the hard clit and sucked for all she was worth.
"Yesssss! Oh, God, yesss, Nikki gonna come! Keep sucking my clit, you beautiful bitch!" Margo yelled at the top of her lungs.
Nikki sucked her sister's clit harder and harder, feeling the older girl's cunt vibrating against her juice-smeared face as Margo began to come.
"Aieeee! Commiiinnngg!" Margo screamed. Just when Margo felt her orgasm beginning to subside, her sister sank her sharp teeth into the sides of the pulsing clit. Margo shrieked as she came again, her spasms of pleasure just as intense as they had been with her first climax.
The older girl saw bright colorful lights flashing before her eyes, in spite of the fact that her eyes were tightly closed.
"Omigod! Omigod! I'm coming! I'm coming so fucking hard I can hardly believe it! Jesssus, yesssssss, Nikki, you hot bitch! You made me come sooooooo hard! I'm still comiiinnnggg! Keep it up, Nikki, don't stop eating me now! Keep sucking my clit! Lick it! Bite that sucker! Suck it harder! Keep making me come!" Margo shrilled.
Long moments later, Margo's orgasm slacked off and the girl lay there on the bed, weak and trembling.
"How'd you like that?" Nikki asked.
"Shit, I loved it! You really know how to eat pussy!" Margo answered with a grin.
"I had a good teacher… the best," Nikki said warmly.
Nikki crawled up beside her sister and they embraced and kissed each other lustfully. They were lying on their sides now, facing each other, their nipples poking lewdly against each other.
Margo moaned as she tasted her own pussyjuice on her sister's mouth and tongue. That obscene sensation never failed to turn her on powerfully.
"I love making it with you, Sis. I hope that we can always get it on together because you'll probably be the only lover I'll ever have," Nikki said.
"What are you talking about?" Margo asked in surprise, pulling slightly back from the girl.
"Well, why should I need anyone else? I mean we make each other came, don't we?" Nikki asked.
"So what? I love the way you make me come, but I still need cock." Margo said with a husky laugh.
"Well, I don't," Nikki said defensively.
"Hey, wait a minute, Sis! Just 'cause you're a virgin now doesn't mean that you always will be! Someday you'll meet someone you want to fuck!" Margo said.
"Well, I've met a lot of boys but I haven't met anyone yet that I want to fuck. In fact, I turn off when they start to touch or kiss me," Nikki admitted, flushing with embarrassment and hoping that her sister would not think her perverted.
"Listen, I've been thinking, honey. You really turn on to incest, I know. I remember your telling me just last week how a lot of your pleasure in making it with me comes from the fact that we're flesh and blood sister," Margo said, thinking hard.
"Yeah, that's right… but so?" Nikki asked.
"So… why not think about having our brother pop your cherry for you?" Margo asked excitedly.
"Mark?" Nikki gasped, hardly able to believe her own ears.
"Sue, Mark. I happen to know for a fact that he's really horny for you – he's told me so many times. How about it? Do you want to fuck with Mark? Since he's our own brother, maybe he can really turn you on in a way that those other boys can't."
"Oh, God, Margo, I just don't know. I never thought of such a thing…"
"Come on, Nikki, go for it. Having your pussy eaten out is great, but it's just not the real thing. Only a guy's cock can give you the sexual thrill you really need," Margo said.
"I don't know if I'm ready for that. It scares me just to think about it," Nikki said softly. "You know, Margo, sometimes I'm afraid that I'm gay."
"You? Don't make me laugh! But, if that's your fear, then what better way to find out for sure than to fuck with Mark?" Margo asked. "Don't you ever feel horny when you're around Mark?"
"Well… no… yes… I don't know. But I do know that I'm feeling horny right now," Nikki said with a giggle.
"Well, then, what are we waiting for?" Margo said thickly as she pushed her sister onto her back and eagerly began to suck her throbbing nipples.
"Don't worry, baby, I'm gonna make you feel real good but I won't pop your cherry. I'll save it for Mark," Margo said huskily.
Her big sister's obscene words made Nikki tremble with lust, and she wondered if she ever would get up enough nerve to make it with her own brother and let him pop her cherry for her.
Then Nikki stopped thinking. All thought was driven from her lust-filled mind as she surrendered herself completely to the joy of haying her pussy eaten out by her horny sister.
Margo licked upward from Nikki's asshole to her shivering virgin cunt.
"Yesss, that feels great, Margo, great! Eat meee!" Nikki cried.
"It'll feel even better before I get through with you honey," Margo said hoarsely, beginning to lick her sister's pussy harder and faster with her raspy tongue.
"Ohhhh, you're making my pussy feel soooo hot! It's burning up, Margo!" Nikki yelled, thrashing her head from side to side on her pillow.
Margo licked her sister's pussy with the fiat part of her rough tongue. She lengthened her strokes until she was licking the entire length of Nikki's cunt with each wet lick. She began each lick at the bottom of the girl's juicy slash and didn't stop licking upward until her tongue was resting on the top of Nikki's pussy mound.
"Oh, God, yessss," Nikki moaned.
She could feel the flat part of her sister's tongue rubbing across her swollen clit with each stroke, and she felt her orgasm growing.
"Ohhhhh, you're gonna make me come, Margo! You're gonna make me come so fucking hard!" Nikki yelled, her voice strained with sexual tension.
Margo now began to concentrate on her sister's clit. She made her tongue as stiff and pointy as possible. Then, using her cock-like tongue, she began to roll Nikki's clit in circles, over and over again before whipping hard with her tongue.
"Commmiiinnnggg!" Nikki shrieked at the top of her lungs as deep spasms of incestuous pleasure began to pour over her, making her cunt shudder violently against Margo's sucking face.
Gushes of warm pussyjuice shot into the older girl's mouth and she greedily smacked her lips, swallowing down every single drop of her sister's tasty girl-cum.
Margo did not stop licking her sister's pussy until Nikki's orgasm ended. Then the older girl pulled her juice-smeared face away from Nikki's pussy and crawled up on top of the still trembling girl.
"Ohhhh, that was soooo good," Nikki moaned as she began to lick her own cuntjuice off of her sister's face. "Why can't we just go on making it with each other? You always make me come so hard! Why do I have to get it on with a man?"
"Honey, you and I will always make it with each other. And why not? We've got a good thing going! But, I'm telling you, there's no thrill like the thrill of being fucked by a big meaty cock! And, besides, don't you want to find out once and far all whether or not you're gay?" Margo asked with concern.
"Y-yes, I guess I do," Nikki said tremulously. "You know you do! You can't live with a thing like that all your life! Come on… Mark wants to fuck you… and he's good, I promise you," Margo said.
"You mean you and Mark have fucked?" Nikki asked incredulously.
"Wow! You really are an innocent," Margo laughed. "Sure! We've been getting it on for ages now! And his cock is really big and it gets super hard and, best of all, our dear brother knows just what to do with it!"
Nikki found herself giggling with her sister in spite of herself. "I-I guess you're right. I should find out once and for all if I'm a lesbian or not."
"Right! So you just leave it up to me. I'll set it up for you so you won't have to worry about seducing Mark," Margo said.
"Okay, but, remember, I don't think I'll even be turned on by him," Nikki said.
"Don't be so sure, honey. Just think about this – when you got all horny and wanted me to eat you out, it was right after we talked about you and Mark fucking. I think you are turned on to him whether you're ready to admit it to yourself or not!" Margo said as she began to suck the girl's tits again.