Nick gets taught to love his big sister's cock

"Oh...fuck." Your baby brother moans, burying his face in the sheets and biting down. He's trembling like a leaf, his body struggling to even handle the raw, animal pleasure of being bent over and bred by his older sister. You're being rather gentle right now, by your tastes, just slowly sliding the swollen head of your cock in and out of his stretched hole and pushing a tiny bit deeper each time. Each languid thrust is angled just right to press against his tender prostate as it passes, and you smirk to see his poor twitching dickie already drooling clear liquid onto the bed. Meanwhile, your groping hands stroke and caress his hips and butt like you already own them, constantly focusing his attention away from that pathetic thing. It's very cute, so small and pink and adorably hard, but that doesn't mean you're going to let your baby brother use it ever again during sex. From now on every orgasm he has is going to come with his older sister's cock buried in his butt. He's going to learn to love getting dominated, punished and fucked by you, even more than he clearly already does.

And what better way to ensure that than by giving him a whole lot of them now, milking every drop of cum from his cute little balls until he's orgasming dry, leave him squealing and moaning like a girl as you mount him and pound him into the bed the way he's clearly always wanted to be treated by his older sister? You wonder briefly if all his bratty, ungrateful behavior was an attempt to provoke just this reaction from you. If every-time he sneered or cussed at you he was secretly hoping you'd bend him over your bed and teach him some respect the long, hard way. It's such a delicious thought, sending a pulse of warm delight through your body, and in the haze of boiling lust you find yourself thinking it just might be true after all. Well, if it is, your naughty brother needs way more punishment.

You'll spank him again later, you decide, or something even more humiliating. For now, he needs to be fucked, hard and deep, until he's a cute, moaning mess stuffed full of your cum, then again and again and again until you're utterly satisfied. You find your hips starting to thrust faster as hungry moans escape your trembling lips. Nick is squealing now, muffled by the sheets he's biting down on, but you hear the shrill sound rising towards a frantic peak as you slam into him even harder, burying more of your cock inside the tight, clenching heat of his butt. This naughty little brat is about to cum already!

Your hand moves, darting up to land a hard smack across his quivering butt that leaves a delicious red welt across the fading pink of the earlier spanking. His shrill yelp of pain dissolves into a pathetic little groan, his soft thighs shuddering. Just like that he's cumming, his poor, twitching little cock dribbling onto the bed. That's one, you smirk to yourself, as you feel his tight, clenching hole strangle your shaft, sending crackling pleasure through your throbbing skin. The second comes just a short while later, when you slam your hips forward to bury about two-thirds of your veiny shaft into your wriggling brother. He bucks and trembles against you, moaning like the boy-slut he clearly as your cock forces another pathetic load from his softening cock, watery cum dripping onto the bed from the wilting pink tip. Your hands are on his hips, fingers digging into his smooth skin as you hold him tight. Without them, you're sure he would have collapsed like a doll into the bed by now, but you keep his butt nice and high so you can fuck it hard and deep as long as you want to. He needs to learn his new role in life after all, as his older sister's willing cocksleeve, to be used like this and so many other delightful ways whenever you want.

"Lucy...oh God" You hear the muffled words from where his head is buried against the sheets. "It's so big! Please...oh, it feels so good! I can't...I can't take it...!" His voice rises to a hoarse squeal at those last trembling words and he bites down hard on the blankets again, a shudder passing down his spine.

"I'm sorry, little brother, but I'm not stopping." You coo with delight, working your thick shaft even deeper, feeling his clenching butt open up more with each thrust. It's so warm and tight and lovely in there...like it was made just for your cock. "You deserve this, so take it like a good boy, every fucking inch!" You ram your hips forward suddenly and your muscled thighs smack against the quivering flesh of your little brother’s butt as you hilt yourself inside him at last, your thick cock skewering him through. For a blissful moment as you savor the delicious feeling of burying every inch in his warm hole, he's utterly still, caught on an indrawn gasp of utter shock.

Then he screams out, a shrill shriek of pleasure that echoes off the walls of your bedroom, ringing in your ears as you fuck him hard through the twitching, moaning and squeaking that follows. The last pathetic drops trickle from his soft cock onto his trembling thighs, but he's still cumming anyway, his tender hole squeezing so tightly at the base of your shaft it's almost painful while his warm guts clench and milk the rest. His body knows what it wants, what it needs, even as the boy thrashes and squeals, out of his mind with pleasures he's never dreamed of. You can feel how his hole sucks so greedily at your cock as he orgasms dry like the good, little buttslut he is, every part of him **** to coax a thick, sticky load from your churning balls.

Well, you can be generous, and the heavy fullness of your aching twins is getting rather hard to bear. As your brother trembles and moans, you draw your hips back, sliding your shaft out until just the head remains inside him, his stretched hole squeezing tight. Then you slam forward again, right to the hilt in one savage thrust. His guts are already molded into a warm, perfect home for your cock, and you slide right home, a hungry growl of pleasure escaping your lips as you once again find just how good it feels to be buried deep inside your little brother. He's cumming again, of course, the little slut, his hoarse mewling moans ever so delightful as his soft cock twitches and throbs pathetically. A few more times you do the same, drawing back for a trembling moment of blissful anticipation, then skewering him on your aching shaft, forcing yet another squealing climax out of your slutty, needy baby brother.

As one of those powerful thrusts leaves you buried inside his butt, you feel your aching balls tighten, heat flooding up through your belly and down your pulsing shaft. Poor Nick must know what's coming, because he trembles underneath you, his whole body going limp and another muffled shriek of pleasure emerging from his lips. The mewling need in that shrill sound fills your ears as you finally cum, dumping what feels like the largest, thickest load your balls have ever made deep into his belly. You keep your cock buried, moaning hoarsely, as it just keeps coming, spurt after hot, aching spurt shot into his clenching guts. Nick is frozen now, apart from the shivers and sharp little moans, and you slip a possessive hand down under him, resting it on his belly. You can feel the hard bulge of your cock right there, pressing up against his skin, and now another tight ball of stretching skin where your load is filling the boy up like a balloon.

At long last, the endless flow of cum eases off, leaving your brother bloated and groaning softly into the bed, your groping hand still resting on his adorably swollen belly. Smirking to yourself, you slide your hips back. Even after that titanic load your cock is still hard somehow, the throbbing shaft glistening with cum and lube as you pull it free of his well-used hole. The swollen head pops free last, leaving his poor butt gaping open and dribbling a trickle of your cum down his crack. The sight of that once-tight hole makes you purr with pleasure, knowing just how much you're marking him as yours in this one night of bliss.

"Good boy, Nick, you did very well." You murmur, gently lowering him down onto the bed. He makes an adorable little sigh at that, shivering a little as you lay him on side, his swollen belly resting on the sheets. Your hand settles on his flanks and you start to tenderly stroke his sweat-sheened skin. You sense he needs some time to recover, and some kindness from his older sister so he doesn't start feeling like he's nothing more to you than just a toy for your cock. No doubt all that pleasure has left his silly boy brain rather delicate and raw, the time when those feelings of worthlessness can sink into a delicate thing like him. A rather nasty voice inside you whispers that you should just keep going anyway, roll him on his swollen belly, lay over him and slam your cock back where it belongs inside his needy butt. After all, isn't he just a toy to you? Isn't that what you were trying to prove?