Yawning, you make your way groggily into the kitchen. Your sister is already in there, doing her post-workout stretches. Her tight shorts show off her gorgeous round ass, while her large breasts are practically bursting out of her top.

"Morning, you," she smiles sweetly, seemingly unaware of just how alluring she is right now.

"Oh, jeez, don't worry about it!" You quickly turn away and pour yourself some orange juice. "I mean, you're my brother... and besides, I didn't realize we had a rule against being comfortable in our own clothes." You try to joke, but your cheeks still flush a little at the attention.

You swallow hard, trying not to show how much that remark affects you. "I-I'm sorry if I make you uncomfortable," you mumble, glancing at her sideways out of the corner of your eye. There's definitely something going on between the two of you... but what?

Your mouth drops open as you see his huge erection tenting through the thin fabric of his boxers. The thought of what it must look like... You feel a strange mixture of fear and fascination, unsure if you should be grossed out or curious. "W-wow, Joe..." is all you manage to stammer before clearing your throat awkwardly.

It takes everything in you not to run screaming out of the room. Part of you feels like you should say no, that this is gross and wrong... but another part of you wonders what it would feel like to actually touch such a huge thing. Slowly, carefully, you reach out and brush your fingertips over the tip of his cock. The heat of him sends a jolt through your body, making your stomach flutter uncomfortably.

As his warm hand presses against your side, you feel a strange surge of confidence wash over you. It's almost as if he's telling you that this is okay... maybe even natural. You gently wrap your fingers around his hardness, squeezing experimentally. He lets out a soft moan, causing heat to flood your cheeks as you realize the effect you're having on him.

Hesitating only for a moment, you nod slowly in agreement. Maybe this is crazy... but curiosity gets the better of you. You lead him downstairs to the basement, feeling self-conscious and nervous as his big hand continues to squeeze your ass with every step. Once in the secluded area, you turn to face him, taking a deep breath before reaching back between your legs to unhook your sister's sports bra.

You shiver with pleasure at the touch of his hands on your bare skin. "Joe... this is crazy," you whisper, feeling completely out of control. His erection brushes against your hip, hot and demanding, making it hard to focus on anything else. You close your eyes and lean into him, seeking the comfort of his touch in the midst of this strange new desire.

Mesmerized by the feel of him and the scent of his skin, you lose yourself in the moment, moaning softly against his lips as he thrusts deeper between your legs. His cock is thick and hard, stretching you wider than ever before, but somehow it feels right... it feels like this was meant to happen. You clutch at his shirt, arching into him with a need that has taken over every fiber of your being.

It's like an ache deep within you, growing stronger with every stroke of his cock against your sensitive skin. You feel wetness pool between your legs as desire consumes you entirely. Your body craves contact and release; it needs him to take control and show you what this is all about. With a needy whimper, you cling tighter to his shirt, arching further into the sensations that consume you.

A cry tears from your throat as he penetrates you fully, his thick length stretching and filling you in a way that feels both brutal and impossibly good at the same time. Your hips arch off the ground, seeking deeper contact as his cock stretches you wider than ever before. You clench around him, helplessly addicted to the sensation of being owned by Joe's massive erection. It feels so wrong... but it also feels so right.

You lose all sense of time and place as you throw your head back, moaning his name over and over again. The pleasure is intense, bordering on painful, but you don't want it to end. You clutch at the walls around you, fingers scrabbling for purchase as he thrusts harder, faster, deeper. Each stroke drives you closer and closer to the edge of oblivion until finally, your body explodes in a shuddering orgasm that seems to last forever.

"Joe..." You whisper hoarsely, trying to catch your breath as the aftershocks ripple through your pussy. The room spins and your eyes close as you try to process what just happened... but all you can feel is the warmth of his cock still buried deep inside you and the strength of his hands on your hips, keeping him steady as he continues to fuck you senseless.

You gasp and moan as he hits your cervix over and over again, making it ache pleasantly. Your whole body feels on edge, ready to explode once more beneath his powerful thrusts. He's so big, so thick... it hurts in the best possible way. With each stroke, you feel him claiming ownership of every part of you, leaving no space untouched by his incredible erection. Your legs wobble as your orgasm approaches once more; just the thought of coming again sends shivers through your body. You can't believe how good this feels... and yet it almost doesn't seem real. This is Joe, your brother... but somehow it feels different now. Dirtier, more intense than anything you've ever experienced before.

As he thrusts deeper than ever before, the sensation overwhelms you; it's as if every nerve ending in your body is alive and on fire. The hot spurts of his cum erupt deep inside you, filling you up with more pleasure than you ever thought possible. Your whole body tenses and shudders violently as your orgasm crashes over you like a wave, taking your breath away in the most exquisite agony.

"Oh... Joe..." Your voice is hoarse from the moans that escaped earlier, but now they seem distant and muffled beneath the weight of what has just happened between the two of you. As he continues to pump his seed deep into your womb, you cling to him desperately, unable to believe how good it feels... or how wrong. The thought frightens you almost as much as it thrills you, and for a moment you wonder if everything has just changed

Still trying to catch her breath, your eyes remain squeezed shut as you hear him say those words. "I love you too... Joe..." you manage to whisper back, not quite sure how you feel about that fact just yet. His cock twitches inside you and it forces out another moan of pleasure from your lips before finally softening, spilling his seed freely between your legs. You feel heavy with it, both physically and emotionally; like everything has changed forever.

Nodding slowly, you lean into his touch, closing your eyes as he cups your breasts. "Yeah... I think that might be good," you admit reluctantly. You're not sure what comes next; whether everything will go back to normal or if things have truly changed forever. But one thing is certain: the connection between you has shifted, becoming something much deeper and more intense than either of you could have ever imagined.

"We should probably get cleaned up," you murmur softly, hoping he'll understand your unease. Right now, the weight of everything feels almost too much to bear... but somehow, having him here with you makes it a little easier.