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A week or so ago, I found a challenge posted to Reddit:

You both will be tied face to face by a trusted third person. Both of you will have vibes tied to their pussy. Winner is who can cum more often. The Loser will be punished and has to serve the winner for a time of Orgasm Difference \ 1 hour.*

I found the thought of this incredibly arousing, it gets my pussy wet just thinking about. I discussed it with the poster for a while, pondering the best to way to go about it, before messaging a very loyal and equally kinky friend and asking her if she, and her boyfriend, might be up for it. We would need his help and I can't imagine many men would hate the idea of watching two women orgasm over and over again.

Eventually we settled on Sunday afternoon, after the British Grand Prix. They came round for dinner, nothing too heavy, but with a large glass of wine each. We had briefly discussed what things we might need, but we figured our plans out more firmly over dinner.

Once the meal was over, we both went to change while he cleared the table, pushed a few things to the walls and made space. He positioned two dining chairs in the middle of my dining room, making sure we would have a good view of the city and then laid out the rest of the things on the dining table.

We both returned a few moments later, almost entirely naked. We have on almost-matching heels, her in black patent and me in nude patent Lady Peep from Louboutin, with nude stockings and plain black suspender belts. We both have out hair pulled up into a rough bun. Judging by the look on his face, we look incredible together as we walk into the room hand in hand.

He asks us both to turn around, facing away from him, then takes a metal princess plug and lube. He carefully inserts it into his gf. I get to see her face as the large piece of metal enters her and it's exquisite. She squeezes my hand as he does the same to me, I feel it stretch my arse wider and wider before slowly slipping inside. It's a feeling that never gets old!

We toss a coin, to see who goes first. I lose, but she picks to go second. We take our seats, he gives her another glass of wine before returning to the table and retrieving a length of rope.He starts to wind it around my ankle and the chair leg, a little tighter than I would have liked. He does the same for the other ankle, then my knees, pulling them apart as he ties them to the verticals below the arms of the chair. Next my wrists, then my elbows and finally just below my breasts, all tied firmly to the chair I am sat on.

It's an exhilarating feeing, having someone immobilise you like that and knowing, to some extent what will come next. He reaches down and slides his fingers through my increasingly wet pussy lips, before offering them to his girlfriend to lick clean, which of course she does without hesitation. Then he takes a long, flexible arm with a clamp on each end. We purchased them especially for the occasion, they just happen to fit Hitachi Magic Wand Vibrators perfectly.

He attaches the clamp to the leg of the chair and bends it roughly into position. He then trails an extension reel from the far side of the room to sit on the floor between us. He takes the aforementioned vibrator, attaches it to the stand and presses it firmly against my wet pussy. It makes me gasp, its kinda cold and he's not being gentle.

He takes a step back to admire his work, before turning to his girlfriend. Without saying a word, he takes the glass of wine from her and begins to repeat the process again, carefully and tightly tying her in place. Attaching the clamp to the chair leg and the hitachi to the clamp.

He speaks for the first time since we had walked into the room to ask us if we are ready, we both say yes and he starts a 1 hour timer, and turns on the vibrators. I close my eyes and tip my head back. These particular models have four modes, but even the lowest one is intensely powerful.

We had agreed two things, he would keep score, but it would be up to us to signal an orgasm with the thumb on our left hand. If we wanted more or less power we would signal that with the thumb on our right hand. It was incredibly clear to me at this point that I did not need more power!

The powerful vibrations thundered through my body. I quickly lost track of time, instantly becoming preoccupied with trying to force myself to orgasm as fast as possible, despite it being almost entirely out of my control.

Annoyingly, I did not orgasm first. It was only a few minutes before my best friend exploded for the first time on the head of the hitachi. Her reward for this was a large ball gag which he fitted for her. We had discussed using other toys, they were all laid out on the table, but I had already forgotten what we had agreed on.

A few minutes later, I had my first orgasm, my hands gripping the arms of the chair tightly as I moaned and groaned and eventually squealed my way through a really rather incredible orgasm. All the while my tight arse is clenching and relaxing over and over against the plug. But there is no room to relax, as I get my own gag, the hitachi continues to thrum with pleasure.

As the gag settles into my mouth and the straps are fastened behind my head, I make eye contact with my best friend, I watch that blissful agony wash over her face as she starts to orgasm again. It's so incredibly sexy watching a woman orgasm, doubly so when you compare it to the male orgasm. She writhes in ecstasy, her pert breasts rising and falling as she gasps for breath, struggling to breath deeply around the gag. It's enough to encourage my own orgasm, bringing us to two each.

The third orgasm for each of us comes with yet another reward, an item I generally detest, nipple clamps. We reach that third orgasm together, almost simultaneously and I get my nipples clamped first. It hurts, I hate it and it appears that she feels similarly.

The fourth orgasm bring a blind fold for each of us and the fifth a mini vibrator slipped into each of our pussies. By this point I am a complete mess, the chair is soaked, there is drool hanging from my mouth thanks to the gag. Around this point it starts to get hard to tell where one orgasm ends and the other begins.

In a calm and quiet voice from behind me, a voice whispers into my ear that if I can orgasm next, I will get to watch him jerk off over her face. But if she orgasms next, I will be the recipient of the same. Oh turmoil, I do love a messy facial, but I like seeing them on other women just as much. I raise my right thumb and ask for more power. I feel him reach over my shoulder from behind, his breath on my neck and the mighty vibrator kicks it up a gear, making me instantly erupt into orgasm.

A few seconds later the blind fold is removed, I watch as he walks, now naked, over to his girlfriend, his cock is clearly throbbing in pleasure. He puts one foot up onto the arm of the chair and starts to jerk himself off, he pulls down the blindfold at exactly the same instant as he starts to cum. The hot white liquid covers her face, it's a huge load. Its in her hair, over her nose, cheeks and forehead. She looks completely shocked and that distraction lets her fifth orgasm hit her without warning.

I can see cum starting to run down her face, dripping onto her breasts as she shudders violently through that next orgasm. It occurs to me that he has laid down the clock I should be able to see, I have no idea how long it has been or how long we have left....not that I care. I just want more.

The rest of the orgasms come quickly, I make it to double digits first, but then I stall, too scared to increase the power any further. She overtakes me, apparently by three at one point. At this point everything is a blur, a moaning, gasping, gagged blur. Overstimulated, tired, aching, sore wrists and ankles. One of us has lost a shoe, the other has laddered a stocking. I can feel a very wet puddle on my chair and the vibrator is clearly buzzing away against a very wet pussy. I want it to stop, but I want it to continue.

Eventually the timer goes off. With a groan of relief, the vibrators stop and are moved away from our sore, soaking wet pussys. We look at each other, a little stunned as the gags are removed from aching jaws. Mine has teeth marks in it. It takes a while to untie us both, I have the benefit of going first and I am soon rubbing sore wrists. Hiding the rope marks on Monday was going to prove difficult.

As he tosses the last of the rope to one side, we both look at him, demanding to know who the winner is and who gets to take charge for round two. Eventually he reveals that I had lost, by two. I was devastated, I had tried so hard to orgasm as many times as possible, but in the end I was so tired I just couldn't any more.

My initial punishment was to tidy up while they she went for a shower with her boyfriend in my bathroom. The rest of the punishment has been banked for another time and I cannot wait!