Suddenly the girl stiffened, and Karen could tell just by staring at the girl's back that Kathy was on the verge of orgasm.
"Oh, shit, I'm cumming, Jimmy!" the girl squealed. She started humping harder than ever, grunting and panting, banging her throbbing fuck hole onto Jimmy's cock root as hard as she could. "Unngggh! Fuck my pussy, fuck my horny pussy! I'm cumming, cuummiinnggg!"
Karen could actually see Kathy's wet, hairy pussy slit throbbing in and out, clutching the base of Jimmy's boner as she came again and again. Jimmy kept fucking her, guiding her through the fury of her cum.
It was then that Karen finally recovered herself. She stood up straight, her face very red and her pussy very itchy. Then she cleared her throat loudly.
"Excuse me."
"Oh, shit!" the girl gasped.
Kathy practically leaped off of Jimmy's lap, around and looking up at Karen in Jimmy just groaned and smiled half humorously, slumping on the couch with his huge cock twitching wetly over his belly.
"Oh, fuck!" Kathy gasped. "D-d-don't tell my parents! Just don't tell my parents!"
"But I don't even know your parents…" Karen began.
But the girl was obviously too frightened to listen. The terrified blonde swiftly started struggling into her clothes, nearly falling over in her haste to wiggle into her tube top and tight faded jeans. Karen tried to think of something else to say to her, but it was obviously too late. A minute later the girl was gone, slamming the door behind her. Karen heard the frightened footsteps scampering down the hall.
Which left her all alone with her naked kid brother.
"All right, Jimmy! For God's sake!" Karen stood in front of him with her hands on her hips, her cheeks red, trying not to ogle his giant boner as she looked at him as sternly as possible. "Would you mind telling me the meaning of this right now! Please!"
"The meaning of what?" Jimmy grinned. "Shit, I didn't do anything wrong. We were just fucking that's all."
"Jimmy, you're… you're just a baby!" Even tough he was eighteen, Karen still sometimes thought of him as a child. "And that girl…"
"She's eighteen too, Sis."
"I don't care! You… you were fucking her right on the couch like that! What if I'd had a friend with me? It would have been the most embarrassing…"
"Well, where else was I supposed to screw her?" Jimmy said, still grinning. He obviously didn't take his sister too seriously. "In your bedroom? That would've really gone over big with you, huh? I mean, seriously, you're the one who ought to apologize!"
"What for?"
"For busting in on us without letting me cum first!" Jimmy shot back. "Shit, I was just about to dump a big load into her! Now I'll probably get blue balls!"
Jimmy grimaced and slumped lower on the couch. He gripped his enormous prick and jacked it several times, making the fat knob puff up and emit milky droplets of pre-cum. Then he just lay there with his giant fuck organ throbbing over his belly, the most suckable looking cock that Karen had ever seen.
I'm losing control of myself. Karen thought dizzily. She stepped closer to the couch, her huge mammaries heaving under her sweater, now staring openly at her kid brother's big prick. Jimmy started to smile as he finally saw what his sister was looking at. His cock got even stiffer, jerking up and down as the blood throbbed through his meat.
"You… you sure have a big one, Jimmy," the horny sister observed breathlessly. "I… I guess I never thought you'd have such a big prick. You being so young and everything."
"Thanks," Jimmy smiled.
"It… it's really stiff, too. You… you were just about to shoot off when I interrupted you, weren't you?"
"Just like I said."
"Then your prick must be all full of jism, Jimmy. It really must hurt."
Acting on impulse, feeling too horny to have any control over her actions, Karen suddenly knelt in front of her little brother. Jimmy just smiled down at her, his big prick throbbing and oozing, by now realizing that he was about to get his prick sucked.
"Maybe… maybe I ought to help you out a little with your boner, Jimmy," Karen said breathlessly. "Seeing as how it's my fault you didn't get to cum."
Karen raised her hand, trembling with cock lust as she wrapped her fingers tightly around the pussy juice-slickened root of her brother's cock. Then the big-tittied sister started jacking the mammoth hard-on up and down, making Jimmy moan with pleasure, skillfully whipping her fist up and down his big prick.
"Oh, Sis!"
"Is this making your prick feel better, Jimmy? You like it when I rub your cock like this, don't you?"
"Shit, yes!"
"I… I can suck it for you too, Jimmy. I… I know most people think that's wrong. You're my little brother. But, I… I think I should do it for you, Jimmy. I almost gave you blue balls. The least I can do is suck your big boner for you, and suck out your hot cum. I… I guess I think that's right…"
Her words trailed off as she lowered her head, holding his big prick with her right hand, feverishly licking and kissing the shaft and flared knob of her kid brother's hard-on. Jimmy moaned, his cock throbbing more rampantly than ever. His cock smelled and tasted delicious, and now Karen's cunt was throbbing with her lust to shove the big salami down her throat, to suck out all the molten cum.
Karen pressed her lips on the tip of his cock lance, then gradually let her lips part. Inch after inch of his gigantic fuck organ pushed down her throat, until she had over a third of the, stiff pisser jammed between her lips.
"Oh, shit!" Jimmy moaned happily.
Karen shuddered with pleasure, her hairy slit leaking in her panties as she savored the feel and taste of the big prick in her mouth. Then she puckered her cheeks and started sucking her brother's boner very hard, pressing her lips around the vein-laced shaft, slurping and nursing contentedly on the tasty stiffness of his prick.
"Unngggh! That's making my cock feel better, Sis! Unngggh! Oh, shit, that really is!" Jimmy groaned and started thrusting his hips off the couch, fucking his aching cock in and out between her lips. "Unngggh! Shit, you're a really good cocksucker, Sis! Unngggh! Work out on it! Suck it hard, make it squirt!"
By now Karen was so immersed in the joy of sucking prick that she no longer cared that she was committing an act of incest with her little brother. Mechanically she bobbed her head up and down, her huge tits shaking under her sweater as she struggled to cram the meaty prick farther down her gullet.
The cock had grown even stiffer now, the knob pulsing wildly on the roof of her mouth. More cum-seed was dribbling out of the tip, and Karen eagerly swirled and swabbed the prick head to lap up all the oozing jizz. Mmmm, it was so delicious! she thought feverishly. Sometimes she thought she loved sucking prick more than all other things in life.
"Sis, jack my prick some more!" her kid brother cried anxiously. "Unngggh! Need you to make me cum, Sis!"
Karen tightened her fingers around the base of his cock, marveling at how fat and meaty it felt. Urgently she started jacking her right hand up and down the throbbing fuck organ, beating his meat from the root up to her sucking lips.
Soon her right fist was pumping in a blur, and she was sucking and slurping on the knob so hard that the tiny apartment seemed filled by the sounds of her cock sucking. Cum, Jimmy, cum, she thought feverishly, as she worked nonstop on his meat. Shoot your cum in my mouth, Jimmy! Sis wants a nice, big bellyful of cream!
"I'm making it!" Jimmy groaned, as if he could read her mind. "Urmgggh! Suck my cock, Sis, suck my fucking cock! Cumming now!"
He clutched her head with both hands, grimacing and arching his hips of the couch. Then an enormous stream of pent-up cum spewed out of his cock head, lashing around the interior of Karen's mouth, basting her tonsils with the outflow of his hot, sticky cum.