Evil keyholder

5 PM sharp, both G and N were in front of Mistress M's door. G knows what to do, but N started undressing exactly as G is used to. N was another Mistress M's slave, maybe from long time before G?

"But how does the chastity works for women?", was G's thoughts for the minutes they were undressing... and then the answer: N wore a chastity belt that locked all her waist, her pussy and also her anus. G asked N to inspect her belt, she allowed to do it.

A single lock closes all the parts, and the shape lets see the shape of N's bush; "watch also from the back" she said; G was stunned; the belt not only 'covered' her holes, but plugs were inserted in her pussy and her anus! But how come with pooping? Does N have a spare key to unlock herself? That was literally UNFAIR, and the expression of G let N to get the question without him asking: "Yes, when I have to poop I have to come here to Mistress M's house".

Ok, that was unfair in the other sense. G has the buttplug that can be removed to poop and then put on again, but that's a trust matter: G can ignore the rule and not put it back on, Mistress M has no way to check it. That way, N was not autonome for such a physiological need...

N was curious about G's arousal: she could walk and use certain position to 'self masturbate' with the plugs in her, she just couldn't have intercourse with others. G couldn't come in any way, due to his spiked cock cage. "How long have you been closed in it?" asks... and when G almost finished to calculate in his mind, they both hear a sound coming from inside: they were late!

They both finished undressing and crawl towards the usual room, but then N turned in the bathroom: G understood, maybe pooping is the priority there.

That was it: Mistress M removed her belt and let her poop... in a strange way: she was using the same potty training for babies... she has to squat on a table, over the potty, while clamps were pulling her nipples up; there was a pulley with some weights hanged on them... those seemed to be sealed bag of poop!

Every Sunday Mistress M threw away her poop, but any other day, the weight changes based on the previous poop... "so Monday is free and Sunday is painful?" asked G: "No, monday is free for my nipples but I get caned according to the hundred grams of poop of the previous week: 100 grams is 10 strikes, you do the math, you're the one good in that", she told with some remorse for the previous public game.

That's why N's inner tights were somewhat darker than the rest of her pale skin.

Two very different conditions from N to G: one not autonomous in an everyday action, the other linked to the force of will to follow the rules; one with the key always at disposal, one with the key in a box full of other (useless?) keys. Was there a reason to that difference? Just the price? Was that a consequence for her previous behavior? G wanted to chat a lot more with N, maybe when the session finishes...

Once she was done pooping and bathing herself, she put back the belt, and they all move to the central room; a new tool seems hanging from the roof: a new chastity belt, bigger but with just one plug: maybe N was doing well, and Mistress M wanted to give her a useful upgrade?

But then, watching that belt from closer, a strange mechanism was in the front part... yes... was penis plug!

G was frightened, he couldn't think of him coming to Mistress M to poop; what if she was not at home when needed? What if G sat on something solid and a strange sound come from the back part of the belt? What if...

"If you misbehave G, you will get to use that kind of belt." Mistress M toned.

So was not the time for G to "upgrade" his chastity devices... that was a relief.

"Wear the strapon and have a 69 on the table, you both have to train your mouthes."

They started blowing each others' plug until they both were chocking... no one seemed to stop them... "Continue until the first of you has an orgasm; the first to have it is going to be punished from the other".

They couldn't see an ending for their training because blowing is not that arousing: is a giving-only action but they are giving pleasure to a plastic dildo, no one is "getting" pleasure from it...

After half an hour, N had an idea: she asked permission to have the orgasm even if she wasn't having one, she faked!

After that recital, Mistress M asked G how does he want to punish N. G was astonished, he didn't expected to have choice in this, and Mistress M noticed that.

Before G could say a thing, Mistress M had the solution: she unlocked N's belt, she replaced both the dildoes with two bigger ones, causing some pain in N that noticed some wire contacts at the end of both of them. Once the belt was locked again, Mistress M chained N to the roof, plugged some cables to the plugs and started playing with her phone. Seconds later, an intense wave of vibrating pulses animates N's belt, ass and pussy!

N was having a real orgasm, now!

"Now you're having a real orgasm right? Why did you fake it? Eh? Why?"

Mistress M seemed very upset, took 2 canes and gave one to G: "let us cool her down!" And started to cane her in a very harsh way, expecting G to do the same. And G did, scared of the consequences of not doing that.

The trembling for the orgasm stopped and a pain trembling started, then another orgasm, then pain, then pleasure... for a long time... even if plugged, N squirted three times and her skin was wet and dark pink, full of stripes.

G was obviously aroused and the spikes did their job, but no real pleasure for him, that seemed a punition even for him! Maybe there was something waiting for him during that session?

"I caned N 76 time today, how many strikes did you give her?" asked Mistress M to G; 

"..., I... I didn't count..."

So Mistress M took that new belt from the wall, and started removing that back plug, since G already had a vibrating one (synced with his phone notifications). "Come here." she said, and G had no choice.

Mistress M carefully removed the spiked cock cage, letting his penis to relieve for a moment after month of spikes; a couple of seconds and G was hard, very hard. Then some lube arrived on his cock, and a strange thin plug came into the front entrance of his penis. That was a plastic thin tube, around 20cm long. His dick was very short in comparison, so he wondered where the "excess" would go... then the answer arrived: the road to the prostate is longer than the lenght of the penis, and that penis plug went smoothly inside G. Then Mistress M took his penis with firm hands and curve it down, in the opposite direction of the erection, facing the anus, passing over the testicles; that was hurtful. Very hurtful. Then the belt was inserted over it, and suddenly G seemed a woman with no penis at all. The vibrating buttplug was still there and was not removed.

"This model allows you to remove the buttplug without having to remove the belt at all; this pipe you see down here is now your only way to pee; remember to sit on a toilet because from now on you cannot pee on your feet anymore, unless you want to pee in your pants."

G had no words to say, the session was over, G received 0 tries on the slot machines since he didn't count the strikes, then N had the time to wash herself and they both went out in the dressing room.

"Do you want to have dinner with me, I live nearby, I want to chat some more with you" told G to N...