Stop! Natalie wants a ride!

"Mmmmmmmmph!" you cry out, ecstatic, body tensing up again, eyes screwed shut, just as Natalie's hand leaves your breast. Doesn't matter, just one more, just one more...

*Click*

"Muuuuuumph?!" you moan, this time in confusion, as the vibrations from inside your pussy suddenly stop.

Wh- What the fuck is Nat doing? Even your internal monologue is out-of-breath. First she does all this, then I... and... she... what the fuck does she want me to do?!

You try and blink the moisture from out of your eyes, as you hear a dull *thud* coming from below you, towards the sofa. Nat is still just about visible, now turned towards the sofa... scratching at her arm? No, taking her jacket off, then dumped on the sofa. Then she reaches down to the hem of her T-Shirt, pulling it up and off in one smooth motion, before it joins the jacket.

Finally, still facing the sofa, she turns to look at you. You can't quite make out the expression on her face, your eyes still not quite able to focus properly, though judging by the way she hooks her thumbs into the waistband of her shorts before slowly sliding them down, bending at the waist as she does, you suspect she's trying to put on a bit of a show. You can't deny she's pretty, watching her pear-shaped ass present itself as she undresses. A part of you tries to remind you that "she's your sister, damnit!", but you feel like you're a bit beyond those concerns now. Though, she does fluff the ending a bit, getting her ankle caught in those tight little shorts before getting them off fully, tossing them aside in a bit of a fluster.

After a moment to compose herself, she turns around, striking a pose, one hand on her hip as the other hangs loose. She looks... stunning. Even through your blurry vision, you can make out the smile on her face as she turns to you, eyeing you up. Her creamy-white hourglass figure blazes against the dark grey sofa and maroon wall. She's wearing a black bra and pair of panties, with a simple pink trim - clearly high-quality and sexy, but not overtly complex or over-the-top. You suspect this was part of some larger plan now... although maybe she just gets a lot of extras with her modelling work. Modelling work evident as she strides towards you, hips swaying as she does.

You're still a bit out-of-sorts by the time Nat's walked over beside you. "Roll on your back," she says as she kneels behind you, although you think it might be more a warning than a command, considering your limited range of motion. Soon enough, her hands are at your hip and shoulder again, rocking you over onto your back

Unfortunately, the man-handling's a little rougher this time. You slip out of her grasp a couple of inches from the ground. The rope digs in suddenly and tightly, causing you to squeal in just pain, again. And... it doesn't subside; Not immediately, anyway. Your new position has your legs bent backwards under you, and essentially immobile. Your arms are pinned under your back, kept similarly immobile, all slack in the line gone. All you can do is whimper, hoping Nat takes pity.

Natalie... kinda does, but doesn't help your situation much. She leans over you, one hand beside your head, bracing herself, while her other ruffles your hair and strokes your face, coo-ing condescendingly as she does. She leans down close to your face, before kissing you on the forehead; Being treated like a sick child leaving you feeling demeaned further. You almost miss the faint minty tang on her breath as she retreats back afterwards, staring deep into your eyes as you look back up at her, begging her to do... something, anything.

A moment later, she's pushing herself up and away. You don't have time to reposition before she comes back into view again, kneeling next to your head. Then her leg passes over your head, before coming to rest on the opposite side of your head, giving you a perfect view from up between her legs as she rests for a second, putting a gentle pressure on your chest. Your eyes are instantly drawn to her crotch - flawless, creamy thighs and a tight, toned stomach framing the pretty black panties covering it; The slight protusion of her lips visible through the material, a faint damp patch visible around their outline.

You're not sure how long your sight lingers on her nether-regions before you resume looking up at her, pleading for release again. She seems to take that as a sign to continue, slowly sliding down your chest as her crotch encroaches on your face, eventually coming to rest just millimetres from your gagged face. You can just about see her face peeking over her breasts, nose and mouth barely visible in the valley between them.

"Go on, eat up."

You stare up at her, confusion overtaking arousal now. There's not exactly a great deal you think you can do with her panties still on and your mouth still gagged.

"Fine, I'll do it myself."

She slides forward again, closing the gap between her crotch and your face as one hand takes hold of the back of your head, pulling you back up into her, nose nuzzling into her mons venus as your gagged mouth rests against her lips. You're still for a moment as she begins to slowly rub up and down against your face, using you like a sex toy. Her musk clouds your mind, raw and sharp, as your mind scrambles to find an equivalent, but fails.

Eventually, you get the hint, and start rubbing back against her, mostly in time with her rocking. Up-and-down-and-up. Tip of your nose pressed against the top of her crease at one peak, your chin pressed up into it at the other peak. Maintain eye contact (People like that, right? Or was that just dudes...) The first couple of gasps you hear are encouraging. You take the removal of her hand from your head as a good sign.

Your mind starts to wander from your own arousal as your satisfy hers... right up until you feel her hand at the base of your pelvis, resting just above the hem of your pants. You flinch, but continue your efforts for her, the worry showing in your eyes, but she's not looking at you just yet.

It's not long before you feel her fingers working their way underneath the band of your pants, then your knickers, short nails pressing gently against your skin as she moves lower. She looks down at you again, gauging your reaction as she goes, entertained but curious. You keep looking up at her, worry increasing as she continues. Eventually her whole hand is underneath, resting against your hip, hitching the band out slightly and letting some air get to your skin.

Again, slowly, she edges her hand closer to your pussy. Fear causes you to flinch as she reaches the crest of your pussy, upsetting the rhythm for a moment. You're getting paranoid over what cruelty she's going to subject you to next.

Then you feel it. Her hand slides lower, moving to cover your pussy, digging the rope out as it goes... and that's it. Relief. There's a little extra tension against your limbs, but the pressure and rubbing against your clit and lips is gone, replaced just by the soothing warmth of her hand. And it feels... good. So good. Your eyes flutter for a moment as you let out an involuntary moan, timed about right with your upthrust. As you refocus, you see Nat still looking at you, happy and nodding, as her middle finger starts to poke its way inside you. You think you get the message. Moaning good, right? Like the vibrations or something?

You continue as she makes her way towards your clit, moving with previously unseen gentleness now. You try and incorporate some moans and eager whimpers into your routine, but they're a little half-hearted until she finds her target. You shout through the gag as she makes contact, the slick warmth of her hand a sensation that takes a little time to get used to after the fibrous rubbing from earlier. You both pause for a moment - you needing a second to process what you're feeling, and her allowing you that brief respite - before continuing. She lets you do a couple of reps before restarting her work on your clit, making gentle movements in time with your motions, timing your moans to when your mouth's closest to her.

It's not clear how much time goes by like this, zoning in and out as you continue on. Your attention returns as you notice Nat's vocalisations change from gentle moans to louder shouts. She's close. And it's having an effect on you, the excitement from her driving you towards another peak, moaning harder into her crotch, driving her further, until finally...