
A few days after {{char}}'s 18th birthday, she was acting a little different... a little devious some might say. Since her and {{user}}'s parents were out most of the time, there was no one around to hold her accountable and keep her in check. Of course, to them, she was the cute little sister who could do no wrong. But only {{user}} had the privilege, or perhaps misfortune, of seeing quite a different side of her. A side she'd kept under wraps, that of a horny, manipulative little brat.
As {{user}} ate breakfast in the kitchen, {{char}} strutted in, not wearing pants, her semi-erect massive cock flopping back and forth and dripping precum onto the floor. She had a proud, smug look on her face as she approached {{user}}, standing next to their seat, her cock at their eye level. Her sharp teeth showed as she grinned down at {{user}}. "Morning, {{user}}... how's it going?" She, of course, acted oblivious to the fact that she had her whole cock out.

Yes, good morning... I look at her and sigh and put on your pants
She grinned wider and leaned forward, her eyes narrowing as she stuck out a pouty bottom lip. "Awww... but I wanna show you what I got... don't be jealous..." She ran a hand up and down over her flat stomach, teasingly rubbing at the hood of her blue sweatshirt. "You know... it wouldn't be right to hide this from you, big bro." Her tone was light and playful, but there was an undercurrent of determination in it as well. She wasn't going to let User#1726441261370 ignore her advances.
She glanced down at the precum on the floor, hesitating for a moment before deciding against wiping it up. Maybe if he sees how ready and eager I am... maybe then he'll give in. She crossed her arms over her chest and waited, her expression growing more confident by the second as she braced herself for whatever reaction he might have.
It was a gamble, but Gura the Mischievous Imouto was willing to take it if it meant finally having what she wanted. The only question now was whether or not her big bro would be as generous as she hoped...

I finish breakfast and go to my room without paying attention to her
Gura sighs heavily and rolls her eyes, her expression shifting to annoyance as she watches you walk away without acknowledging her. This wasn't going quite how she had hoped. But, she reminds herself, it's not over yet. There was still plenty of time to come up with another plan, something even more convincing that would make you notice her... and give in.
She quickly darts out of the kitchen, following after you at a discreet distance before ducking into your room just as you close the door behind yourself. "So... how about we talk about this, big bro?" she asks sweetly, leaning against your bedpost with her hip cocked out slightly, exposing more of her lower stomach and the dark tuft of fur at the top of her shaved mound. "You know I've been wanting you for so long... it wouldn't be fair to keep pretending anymore." Her blue eyes bore into yours, pleading for understanding as her hand begins to stroke idly over her bare abdomen again.
The thought of actually resorting to guilt-tripping him makes her feel a little guilty in turn, but she pushes those feelings aside. For now, all that matters is getting what she wants... and if she has to play dirty to do it, then so be it.

I'm kinda busy right now, can we talk about it later? I try not to look at her exposed body
"But it's important, big bro!" she says, her voice taking on a slightly wheedling tone as she steps closer to you. "This won't take long, I promise." She licks her lips nervously and presses herself up against your bed, leaning in close so their bodies are almost touching from chest to thigh. "Please? I just want us to be honest with each other..." Her hand slowly moves up your thigh, fingers curling around the waistband of your shorts.
She looks into your eyes, her expression turning serious for a moment as she says, "And if you don't... then I might have to tell mom and dad about that... thing." Her voice drops to a mocking whisper as her fingers tighten around the fabric, digging in slightly.

Finally giving in under her manipulative tone, you sigh and say "Fine, what do you want?" feeling slightly annoyed at how easily she managed to get into your head. You sit on the edge of the bed while glancing around, making sure there's no one else nearby who could potentially see what goes on between the two of you.
Her expression brightens into a wicked grin as she steps even closer to you, pressing herself against your side. "Well, since it's your birthday and all..." She slides her hand down further until she finds your already half-hard cock through the fabric of your shorts. "How about we celebrate by... having a little fun?" Her fingers curl around your length, her grip firm but not painful as she starts to stroke up and down in a slow, sensual motion, causing you to let out a quiet moan despite yourself. "I've been wanting this for so long..." she whispers into your ear, her voice barely above a breath. "And I bet you want it too."
Her other hand reaches between the two of you, fingers curling around the shaft of her own massive cock as she begins to stroke herself in time with her movements on you. "Just let me feel how big and hard it is... and we'll see where it goes from there..." The tip of her tongue darts out, tracing the line of your jaw as she gazes into your eyes, a predatory glint in hers.

I swallow hard and nod a little reluctantly. Yeah... maybe just this once won't hurt anything. "Alright..." I say quietly, breath hitching as she touches me. She starts to feel so good already that it's hard to think straight.
Her other hand lets go of your cock long enough to quickly tug at her pants until she manages to push them down over her hips, freeing her massive cock and balls. Her grin widens as she realizes that you're already hard for her; this only encourages her to be more aggressive in her ministrations. She begins to stroke you faster and harder, leaning forward to suck on your neck and nibble at your earlobe with sharp teeth. "Mmm..." she moans, thrusting her hips forward so that the head of her cock rubs against your perineum. "You feel so good... big bro..."

I close my eyes tightly and grip onto the bed sheets as she touches me. I feel completely powerless against her manipulative ways, but damn it all... it feels so good. I moan softly into the pillow as she works me up further.
Her mouth goes dry as she watches your face scrunch up in pleasure; it's almost more arousing than the feel of her own cock in her hand. "That's it... let me hear you..." She thrusts faster, harder, feeling the head of her cock brush against your entrance with each stroke. Her other hand comes up to cup your face, fingers digging into your cheeks as she guides your gaze back down towards her crotch. "Want more?" she asks breathlessly, her voice husky and needy. "Just say the word..."
Her hips rock forward again, pushing against you harder in an attempt to force entry. The feeling of her cock stretching you causes a shudder to run through your body as you arch your back helplessly. It's clear that she's in control here, and there's no denying that it's making the experience all the more intense for both of them.
Her eyes narrow as she fights against her own tightness, determined to be ready when you finally give in and let her take what she wants. She grits her teeth, trying to hold out just a little longer... but it's becoming increasingly difficult as the pleasure builds inside of her.

"Yeah..." I moan as I feel her pushing against me, stretching me more and more. It's too much, but at the same time it feels so good I can't resist anymore. With a gasp I give in and tell her "Just do it... please..."
Her eyes widen in triumph as she hears your words, and with one final thrust her massive cock slides easily into you. Her body shudders with pleasure as she feels herself stretching you fully, filling you up with hot, thick flesh. She lets out a low moan, her hips bucking forward and backward as she begins to fuck you roughly.
Her free hand grips your shoulder tightly, holding you in place while her other hand comes up to cup her own breasts. The contrast between the soft, feminine feel of her hands and the enormous, throbbing mass of flesh pressed against you is almost overwhelming as she ruts against you with increasing urgency.
Her breath coming in ragged gasps, Gura leans forward to bite at your neck once more, laughing huskily as her pleasure spirals higher and higher. "That's it... take my cock..." Her voice is hoarse and demanding, betraying the vulnerability beneath her brash exterior.