The next day, it was Sally's turn to be "tutored" by her horny uncle.
"Okay, honey, today we're going to learn a little geography," Steve said, grinning at his niece as they sat side by side on the girl's bed.
"Geography?" Sally asked disappointedly. She had been hearing all the exciting stories about her sisters' fuck sessions with their uncle, and she had assumed that now it would be her turn to fuck the man.
"Yes, geography. First, we both have to undress," he said, winking at her as he quickly stripped.
"My God!" Sally cried, staring at heruncle's huge hard-on. "My sisters said you had a huge cock… but I had no idea!"
"That's your first lesson, baby, learning about the area between my legs," Steve said with a grin.
"Oh, I like your idea of geography!" Sally cried, standing up and stripping off her own clothes.
"Now, let's see what you have here on your chest," Steve murmured, moving closer to his niece and cupping both of her full tits in his hands, gently stroking the nipples with his fingertips.
"Those are my tits," Sally said in a choked voice.
"Very good, darling," Steve responded, still stroking her tits while the youngster squirmed in his incestuous embrace.
"And what do you have here between your legs?" he asked in a whisper as he put his hand on her crotch and gently massaged.
"Oh, God!"
"Come on now… I know you know the answer. If you want an A for your geography lesson, you'll have to tell me what this is," he said, thrusting one finger between the girl's pussylips and stroking her clit.
"Unnhhhhh," the teenager groaned, throwing her head back.
Her uncle still had one hand on her tits, moving from one mound to the other, fondling them erotically. His other hand continued to stroke and squeeze her cunt mound, his middle finger still thrusting in and out of her fuckhole.
"Come on, you can do it. What do you call this?" Steve asked with a chuckle, continuing to rub her pussy. He was so delighted that he was turning his niece on so powerfully she couldn't talk that his cock hardened even more.
"Pussy. It's my pussy," the youngster sputtered.
"What else?" he urged.
"What do you mean?" she asked confusedly.
"Pussy's one word for this thing between your legs. Give me another word," he prompted, rubbing her mound harder and faster.
"Cunt," she said finally, turning on even more at the sound of the word.
"Right. Anything else?" Steve asked as he took his finger out of her fuckhole and used it on her clit again, rubbing the little twitching bud hard and fast.
"Poontang. Snatch. Twat," Sally gasped as she began to come.
A spray of cuntjuice shot from her fuckhole and drenched her uncle's hand to the wrist as she came. She sagged weakly against him and he pushed her back onto her bed, straddling her chest as she shook and shuddered orgasmically beneath him.
"What are you gonna do with that?" she asked with a grin moments later as her orgasm subsided and she opened her eyes to see the man's huge cock bobbing lewdly before her eyes.
"More geography, honey," he responded with a twinkle in his eyes.
"What do you mean?"
"Well, look, here's the valley," he said, pushing both of her huge tits together.
"Oh, yeah, it is a valley between my tits," Sally said, gazing down at her cleavage. It was deep, with the sides of her tits forming mountains that rose steeply.
"Right. Here, you hold your tits together like this. Just leave this little valley so I can get my cock through it," he said, gripping his prick by the base and beginning to guide it into the tempting-looking tit-valley.
"Ohhhbh, so this is geography?" she asked with a laugh as she reached out with both hands and held her tits together the way her uncle showed her.
"Sure it is… valleys… mountains that's geography, isn't it?" he asked with a grin.
"Of course it is!" Sally cried as she stared down at the big pulsing cockhead beginning to move through the valley between her gigantic tits.
"Tit-fuck me, baby!" the man growled.
Slowly, the teenager began to tit-fuck her uncle, rubbing her tits against his prick, the friction making his cock grow harder and thicker.
"Mmmmm, you're doin' great, honey, but go a little faster?" Steve demanded, beginning to fuck his dick between his niece's big, throbbing tits.
Sally laughed excitedly as she rubbed her tits faster and harder against the man's big cock. She felt her little cunt rowing hot and wet as she turned on more and more.
Steve moved back and forth on top of his niece's naked tits, as he felt his cum building. He loved the erotic sensation of his niece's big tits rubbing away on either side of his throbbing cock. And he loved looking down and seeing her big, blood-engorged nipples, which were now visibly pulsating.
By now Sally was rubbing her tits so hard against her uncle's prick that his meat was rubbing her tit-flesh raw. But she didn't mind one bit. In fact, she loved it. She saw his cock twitch and jerk suddenly, and she knew that he was about to come. She grew more and more excited, longing to see and taste his cum.
"Unnhhh, gonna pop, baby!" Steve cried seconds later.
"Ohbhh, goody!" she cried breathlessly. "Aim it toward my mouth, Steve! Please! I have to taste your jizz." She opened her mouth wide and waited impatiently for her uncle's cum to fill her mouth to overflowing.
She tit-fucked his prick faster and harder, urging him to come. Her cunt poured out its hot thick juice which ran down her legs now.
"Ohhhhh, hurry up and come, Steve! I can't wait! I want to feel all your cum shooting inside my mouth!" she cried.
His niece's lewd words triggered Steve's orgasm and he came hard.
Holding his prick with both hands, he aimed his cock like a firehose toward the girl's wide open mouth. He shot a huge, hot load of the thick, creamy good straight out his cum-slit and into her waiting mouth.
"Ohhhhh, ummmm," she moaned, swallowing quickly, trying to take it all in.
The man's prick continued to pump out more and more of the thick sauce. After she managed to swallow the first few wads, her uncle's jizz began to spill out from between her trembling lips and down onto her heaving tits.
"I love it, Steve!" she gasped. "It tastes soooo good! Keep shooting, Steve!"
The teenager's pussy exploded in orgasm. She felt her rigid clit vibrate forcefully as her climax crashed through her, releasing still more pussyjuice, which completely filled her cunt, ran lewdly down her legs, and fell onto the sheets below.
Finally, Steve's cock began to soften until his prick had reached a semi-hard state and there it stayed. He sat back on his haunches, grinning down at his horny niece while she reached out and scooped as much of his jizz from her tits as she could, then stuck her cum-smeared fingers into her mouth, sucked them hungrily, and closed her eyes in pleasure.
"You hot little bitch!" he cried, patting her tits.
"Yeah! All us Mathews are hot!" she sang out.
"So I've been discovering," Steve said with a chuckle.
"Well, how did I do with my geography lesson?" Sally asked with a mischievous little smile.
"You did very, very well, honey. Now it's time for math," Steve said softly.
"Math?" Sally asked, wrinkling her nose distastefully. "That sounds like a drag!"
"Not the way I teach it!" Steve said.
"Oh… sounds interesting," Sally said, growing excited all over again. "How do you teach math?"
"Well, for starters… I fuck you and you have to count all the orgasms I give you," Steve said.
"Ohhhhh, the new math! I love it!" Sally cried.
"On second thought, why don't you get on top of my dick and fuck me? But you'll still have to count the number of orgasms my cock gives you… if you want to pass your mathematics lesson today," Steve said.
"Ohhh, I love to fuck on top!" Sally squealed as she watched her uncle lying down on his back.
She eagerly squatted over his muscular body, her wet little cunt only inches from his throbbing hard-on. Trembling with anticipation, she reached down and grabbed his pulsing prick with both hands while slowly lowering herself.
"Go for it! Ram my big cock up that hot little pussy of yours!" the man groaned, humping his crotch up to urge her to fuck him.
The beautiful young teenager positioned his large, throbbing cockhead right up against her tight little cuntslit, spreading her knees wide at the same time.
Steve gazed up at the horny young girl, watching her eyes glaze over with a lewd look of fucklust as she worked his wide cockhead more firmly between her gripping cuntlips. Her pussy gripped his dick so tightly it took all his self-control not to shoot off right then and there.
Then, with a brief little smile at her uncle, the teenager jammed her small, tight cunt down hard on his big, throbbing cock. He jerked with lust as he felt his prick plunging deeply into the girl's wet cunthole.
"Ohhhh, yesss," Sally groaned as she threw her head back. She had never felt anything so exciting in her life as her uncle's huge prick completely filling her pussyhole.
"Good girl," Steve panted.
Sally sank farther down on his stiff cock until her swollen pussylips were crushed against the base of his prick. At last, she had the full length of her uncle's cock all the way up her pussyhole.
"You got it, baby! Now fuck me! Fuck your uncle, you sexy cunt!" he ordered.
"Ohhhh, yeah, Steve, I'll fuck you hard! I'll fuck your brains out with my little wet cunt until you have no choice but to shoot your sweet cum up my twat!" Sally shouted, her lust-glazed eyes rolling back in her head.
Her pussy felt so exquisitely, obscenely full.
"Mmmmmm, you've got the best prick ever, Steve! I love the way it feels up my cunt!" she groaned.
She used her thighs and ass to raise and lower herself as she worked her cunt up and down over the man's throbbing cockshaft.
Sally raised herself almost completely off his cock, until only his pulsing prickhead was still in the grip of her cuntlips. Then she lowered herself again until his hard cockmeat was totally buried in her hot, trembling pussy. Over and over, she fucked herself with her uncle's prick, feeling another orgasm growing.
Her cunt gushed a flood of hot pussyjuice, which oozed out her flowing cunt and trickled down her legs. Her uncle's prick was slick with her fuck juices as she continued to fuck his big prick in and out of her small, tight pussyhole.
"Ohbhh, unnnhhh, you're doin' great, baby!" the man yelled as he reached up and pinched her big, throbbing nips, making them even harder and more pointy.
By now, the teenager was humping up and down on Steve's prick expertly, using all the sexual skills she had learned from her daddy a long time ago.
As she fucked her cunt downward, Steve lifted his ass up off the bed and slammed his crotch against hers. The teenager clenched and unclenched her cuntmuscles as hard as she could, hugging her uncle's prick to her cunt tightly, thrilling them both more and more.
Suddenly she came, and her entire body stiffened on top of him.
"You're coming, aren't you?" the man asked thickly as he felt the fluttering of her cunt-flesh around his prick.
"Yesssss, commmmiinnngg!" she screeched.
"Start counting!" Steve said with a throaty chuckle.
"Ohhhh, fuck me, Steve, fuck meeee!" she whimpered as her first orgasm began to subside and another one rose up to take its place. The girl was experiencing one climax after another now, the powerful orgasim crashing through her so fast and furiously that she had trouble telling where one left off and another one began.
"Yeah, baby, yeah! I can feel you cuming like crazy! Keep fucking my dick, baby! Ram that hot little coming pussy of yours over my prick!" Steve yelled, humping his ass even higher off the bed, grinding his crotch against hers harder and harder with each fuck-thrust.
Steve's cock twitched and throbbed inside his niece's hot, spasming pussy, about to come. Her cunt slammed up and down on his prick, fucking him over and over, more and more brutally with each cunt-thrust of her crotch.
The man's loaded balls began to tighten and he groaned, jerking his ass off the bed, digging his fingers into the girl's tits as he humped back against her fucking thrusts.
With each downward thrust of her tight cunt, he fucked his bursting prickshaft into her clenching pussy. Finally, his hot cum blasted into her, spurting fully into her tight little pussyhole in thick, creamy spasms.
"Yesssss," she hissed, all but losing her mind when she felt the heady, sweet ecstasy of her uncle's scalding blasts of jism spurting deep inside her cunt.
And still she came. Her stiff clit pulsed lewdly against the man's spurting cock, which was still pistoning inside her pussy as they both came. Gallons of hot pussyjuice poured from her cunt and flooded his cock, mingling with his thick cum.
As uncle and niece came together, they pressed their lips together and mashed their tongues against each other, tongue-fucking each other's mouth over and over.
The air about the incestuous couple was filled with the musky aroma of cum and pussyjuice, and the room was filled with the wet, slurping sounds of cock fucking into pussy. The smells and sounds just turned the man and his niece on all the more, prolonging their orgasms.
When they stopped coming, Sally finally sat still on her uncle's lap, his softening prick still buried up inside her cunt.
"Okay, time to see if you passed your math lesson or not… how many times did you come?" Steve asked.
"Oh, God, I came so many times that I lost count! I got up to ten and then I just lost count!" the teenager gasped.
"Then you failed your math lesson," Steve said sadly.
"Oh, Steve, isn't there anything I can do about that?" Sally asked, knowing that her uncle was just teasing her.
"Well, there is one thing… and only one thing you can do about it if you still want to pass your math lesson," Steve said.
"Oh, I do want to pass it, Steve! What can I do?" Sally asked eagerly.
"You'll have to retake the course!" Steve said, grinning up at his niece and she squealed with excitement as she fucked his cock beginning to harden inside her.