With a not-entirely-unexpected surprise, and an unwelcome one

"Heeeey, Karen?"

You can't bring yourself to turn back to Nat. You're embarrassed. Angry. Ashamed. With her, and with yourself. This doesn't stop her from carrying on with... whatever she's doing. You sense her stand up, moving away from you. Then, you're not sure. The tapping of plastic, or glass?

"Karen? Smile!"

You hear the clack of a plastic button being pressed in pretty distinctly. The remote you saw earlier, it has to be. Presumably controlling the... thing, whatever it is, that Nat put in you earlier. But you don't feel anything. You're not even sure the device is there, as you attempt to feel for it without exacerbating your current condition; Maybe you imagined it, or...

You don't have to explore for long. You feel the vibrations pretty clearly, pulsing on and off every second or so, not quite evenly. It's exciting you, rather quickly, but differently from before - the vibrations providing more of a deep warmth, slowly building, than the pain and jolt of pleasure from the rope. You sense your breathing getting quicker, deeper, in response to the pulsing.

A part of you wants to just curl up into a ball, let the warmth flow through you. Another part wants to reach around, pull it out, run away. It takes all of your willpower to not do that. But still, a twitch or two manages to get through, pushing the knot just that little bit further into you, or pulling the rope tighter into your mound as you slowly grind into the pillow trying to...

... shit, what are you trying to do? It's like an itch you're trying to scratch. You want to rub to get rid of it, but it won't go - rubbing's only going to make it worse. But maybe part of you wants it to get worse? Or better? Or... Or...

You're really struggling to think now. The aches in your joints from holding this position are really starting to set in. You're just about holding position because instinct says moving bad. You're soaked in sweat. The connecting rope is slick with your arousal, your crotch covered in the faintly-sticky liquid. You're trying to hold it back, to not cum again, but you can feel it getting closer and closer, the unpredictable rhythm edging you ever closer, the rope's twitching...

You hear the clack again. The vibrator carries on for a few seconds, then stops. You consider that it must be on a delay. You take a moment to try and focus on your breathing, try to cool off...

Then the machine hits again, hard. Five, ten, twenty times harder, you're not sure. Your vision blacks out as you let out another moan as you orgasm, this time low and guttural, barely muffled by the gag. Your willpower gives out as you fail to keep your reaction contained - fingers and toes curling, arms and legs trying to flex, but failing, digging the crotch rope into you even deeper than before as you try to press your abdomen into the floor, craving the feeling of something pressing into you.

All this combined leaves your body curved shallowly backwards, taught from your attempt to spread out, but with your precarious position on top of these cushions and lack of focus, you end up falling off and onto your side. The small fall brings you a step closer to reality, a slight bump on your head leaving you a little dazed, but less wrapped up in yourself.

The vibe has stopped, you think. It's hard to tell, your body feeling like it's buzzing, vibrating low, tingly, as you lie there, relaxed. You struggle to get your breathing under control, your eyesight slowly returning, the spots slowly receding. You sense the pillows in front of you be dragged away, and chance a look up at Natalie. She's smiling, but looking down, lower than you, at... at...

"AT HER FUCKING PHONE! SHE'S RECORDING THIS!"

To say you're livid would be an understatement. You stare daggers at her as you try to shout obscenities through the gag. Your failure to do so only makes you angrier, and you try to rend your bindings. That turns out to be a big mistake, as all you manage to do is **** the knot up into your clit again. This time, you overwhelmingly feel pain, though, as though someone had kicked you straight in the pussy. Your eyes bulge in pain, then screw up in tears. Natalie cracks up in laughter.

You retreat back into yourself, trying to contend with your emotions. Anger giving way to deep embarrassment, both at your failed outburst, and the fact that this is all being filmed. Helplessness, over your very literal bindings, and your more metaphorical inability to do anything - to fight back, to run away, to do anything but lie there. You feel weak, over how easy it was to get you like this, but also how easily you just hurt yourself.

The remote clicks again. The vibrator starts instantly this time, but low and slow. You look up at Nat; She meets your gaze directly this time, the same satisfied grin on her face. The feeling of anxiety comes back again, not sure what else she plans to do. But also... submission. You've realised you can't really do anything here, you are completely at her mercy. Whether you want to or not. And part of you certainly wants to. Maybe you didn't want to admit it - not so soon, not like this. But...

But... well, maybe submitting will get you free sooner, too? Maybe that's the practical side - convince yourself of that, then when free, drop the whole act. Sure, that works. But what does she want? She's not giving you any direction. You've near-zero freedom of movement. You can barely even say anything.

Then it dawns on you. The camera. She wants a show. You can work with that. Maybe. But what kind of show? You could play up the struggling, the unwilling angle - It's not too far from the truth, anyway, and still gives you room to enjoy yourself. Or play into the sub angle, act like you enjoy it - that's also not too far from reality, considering you've cum three(?!) times now. Or maybe she wants you to resist orgasming altogether. That's also what you want to do. Part of you. And people are into that, right? Maybe she is? Shit, what to do...