"Well, the girl I have in mind," Amy said, "let's see, she's about five feet six. Weighs a hundred and ten pounds. She has blonde hair – uh, all over, if you know what I mean. And her tits aren't that big, but they're real nice."
"Wh-what else?" Stevie asked, eager for more information now. "What's her name?"
"I'll just give you her initials," Amy went on. "A.W. And a hint. She has a little tiny beauty mark under the left side of her mouth."
These last two details gave Stevie extra reason to wonder. For the description his sister had just given could have easily been of herself. He didn't know if he should say something about it or not.
"Sound familiar?" she asked, playfully yet pointedly.
"Kinda sounds like it could almost be… well, you, Sis," Stevie said.
"And what," Amy then cooed, "if it was?"
"Huh?"
"Here."
Amy had now handed Stevie his glasses. Nervously, he put them on, focusing on his sister, who was standing stark naked before him.
"Wh-what is this, Sis?"
"Just what it looks like, Stevie. I want you to fuck me."
"God… but you're my own sister…"
"That doesn't stop me from being horny for your cock, though. And I know how hard it is for me. I can see the bulge at your crotch. Bet you anything that if I took it out of your jeans and started sucking it, you'd come right away in my mouth."
Stevie was speechless again. And Amy was kneeling. Next, she'd unzipped his swollen fly and was reaching inside his pants. He felt her slender fingers grasping his rigid cock. Then he saw her pull it out into the open, lowering her face to get a better look.
"Not too big," Amy murmured, her warm breath caressing her brother's six or so throbbing inches. "But the same as my titties, real nice. Just the right size for me to get every bit of it into my mouth for a blow-job."
Now Amy took the plunge, getting her first taste of cock. She hadn't expected it to be this salty, but the tangy flavor suited her just fine. That was because it served to make her even thirstier for the jizz that she had planned on making her brother shoot down her throat.
Stevie, of course, had no way of knowing this was Amy's first blow-job ever. Considering how aggressive she was, he just assumed she was hardly any stranger to cock-sucking. Besides, even with his own utter lack of experience, he could still sense that the slurping number she was doing on his prick was second to none.
"Must've gone down on a lot of guys before me to get this good at giving head, huh, Sis?" he asked, using the key terms he'd heard around.
Amy didn't answer, too busy deep-throating Stevie's prick. Inside, however, she glowed with pride from being able to convince her brother that she was a veteran cock-sucker. Giving great head, she reasoned, just must be something that came naturally to her. Which wasn't surprising, considering who she had for a mother.
And now, Amy thought, for the payoff. She knew instinctively that it was on the verge of happening for she could feel her brother's cockhead flexing down her throat. In short, time to prime Stevie's pump just before he delivered the creamy goods.
She squeezed his balls and they hotly churned in reaction. Then Amy increased her suction on his prick.
"I'm coming!" Stevie blurted.
His cock erupted. There was a scalding torrent of jizz, but Amy swallowed it as fast as it spurted. It was, to her delight, even hotter and sweeter than she'd hoped it would be. She couldn't get enough. Indeed, when her brother's climax had eventually slowed to a dribble, Amy sucked even harder, trying to milk out every possible drop of cum.
"You got it all, Sis," Stevie said, "my cock's getting soft and it feels like I might piss or something if you don't quit."
When Amy heard this, it was less like her brother had warned her, as far as she was concerned, than he had issued her a dare. Would he really piss in her mouth if she kept sucking his prick? And if he did, would she be able to drink it the same as she had his jizz? It was, Amy realized, a challenge she couldn't resist.
"I'm telling you, Sis," Stevie stammered.
"If you don't let my cock out of your mouth, I won't be able to help what might happen."
Amy refused to obey. And now, gritting his teeth and groaning, her brother was desperately trying to hold back the tide rising within him.
"It's not my fault," he gasped. "I tried to warn you, Sis…"
Steve's crotch bucked against Amy's face like he was going to come again. But this time his cock was only semi-hard and it delivered a continuous stream instead of a series of spurts, watery and bitter rather than creamy and sweet. Piss! Hot, steaming piss! And Amy was greedily gulping it down the same as she had her brother's cum.
"God, Sis, you're really drinking it, aren't you?" Stevie said, in awe of Amy's bizarre behavior. "I never heard of anything like this!"
And here, abruptly releasing her brother's prick so the last of the piss ran down her tits, a gurgling Amy devilishly answered, "Some things you just make up as you go along."
By this point Stevie was spellbound, fascinated not only by what his sister had done so far but what she might do next. And whatever it turned out to be, he knew he was helplessly along for the whole ride.
"Wh-what now, Sis?" he anxiously quizzed.
"Simple," Amy answered. "We trade places. This time I do it in your mouth with my cunt."
Stevie licked his lips as his sister made him stretch out on the carpet. The next thing he knew he was looking up into drooling jaws of her blonde pussy as she knelt over his head.
"That's right," she called down to him. "I'm gonna sit on your face. And your tongue better be waiting to jam up my cunt as far as it can reach."
Stevie immediately had an oral hard-on, his tongue straining toward his sister's hovering pussy. Then down Amy came, her pussy setting flush against his brother's mouth.
"Now move your tongue inside my cunt," she urged. "Like a snake."
Hilted in her clutching cunt, Stevie's tongue began to squirm from tip to root. Amy squeezed back and she was wet, her pussy juice drenching her brother's tingling taste buds. But she was about to get even wetter.
"Thata boy," she said excitedly. "I'm already gonna… oh, yeah, come! Coming right now in your mouth, Stevie! Drink my cum, suck it right out of my coming cunt!"
Stevie feasted, his sister's orgasmic pussy juice oozing like honey down his throat. He was the same as Amy had been when she'd been swallowing his cum, couldn't get enough.
"Staying thirsty, huh?" she called down.
Stevie sucked in reply.
"Then drink this," she told him, giggling.
Then Amy bore down from within, her cunt spasming around Stevie's hilted tongue. And, with a moan signaling a new form of inner release, she forced her pussy to erupt with even hotter, wetter results than an orgasm alone could produce.
"Yes!" Amy cried. "Drink my piss! Sweetest piss you'll ever taste from any cunt, 'cause I'm still coming at the same time! Pissing and coming… coming and pissing! My cum and piss in your mouth, Stevie!"
Stevie's greedy suction mounted as he went after every drop of the sweet and sour mixture that his sister's cunt had to give. Finally Amy's golden shower had run its course, but she was still climaxing. And, as she did, she recognized her fresh hunger for another mouthful of Stevie's prick to go along with the way he was eating her pussy.
If Amy wanted to sixty-nine, she was in perfect position for it. Sitting on her brother's face, all she had to do was lean forward toward his crotch and there was his cock waiting for her, hard as a rock. Making her move, she went down on Stevie and once more orally fucked his six rigid inches with her cunt of a mouth.
Stevie had heard his share of locker room talk about sixty-nining but never, ever had he expected that he'd get lucky enough to try it himself. But now that he found himself locked into the magic number, it came so naturally he felt as though he'd been doing it all through high school.