�Yes. I look after zee little girls, I make them feel special I think? I show zem many things. Now I show them now how to wash their private girly clothes, no? Zey wash them with mouth first if zey have really dirty clothes� now zey help dry them.� Helga moved to the nearest girl and stroked her head through the rubber hood. �Yes I treat zem like they my own children. But they very young so they have lot to learn and sometimes it painful for zem to learn I think. You see they both only fourteen� Zey have nice breasts for fourteen I think, no?�

Catherine's mind was spinning. Fourteen? She didn't know anyone with a fourteen year old girl except her sister who had� Catherine stifled the desire to scream �No!� at the top of her voice. These were her twin nieces!

�They both the same you know, both have zee big breasts for little girl. But zen what one has I suppose other twin have.� Helga continued.

�Oh God! Please no!� Catherine said out loud. Mistress XS looked up as she spoke and said �What you don't want it to be� what are their names, Serena and Alex? I'm sorry, but they were just too ripe and innocent for us to pass them by! You can imagine how much demand they are in with the Group. I mean two pert blonde fourteen year old identical twins? They've been fulfilling fantasies here all over the place.�

Mistress XS laughed heartily out of the sheer joy of Catherine's internal plight. �Oh yes; they were virgins you know when they came here, but Dr Saavik had the honour of divesting them of that, and by now they've probably had more cock and dildo in the past month than their mother has in her life!�

Catherine immediately thought of her sister as Mistress XS spoke.

�And talking of whom,� Mistress XS said as if reading Catherine's mind, �you're probably wondering what's happened to Georgina ? Don't worry she's safe and sound. At this very moment she's entertaining one of our members who has a penchant for torturing breasts, and, the last time I saw her, she was suspended by them and having them used for target practice with his air pistol!�

�She's really turning into a marvellous slave, and she's been very good in helping film some stuff for you � but we'll come to that later. For now I suppose we should get the twins on the wheel��

Catherine didn't hear what Mistress XS said next because she had to run to the bathroom to throw up what little there was in her stomach. She managed to squeeze herself round the throne-like commode and retched into the bowl of the toilet. As she did so, her retching intensified as she realised that whoever had been into her apartment had pissed in the bowl and not flushed it � the stench of stale pee was overpowering!

It was only once she had finished that she tried to flush the toilet�

The handle moved with no resistance and nothing at all happened! For some reason, the fact that the toilet wasn't working properly made her want to pee desperately herself and she was reduced to peeing into the foul-smelling toilet and closing the lid on the stench before returning to the living room.

If Mistress XS had missed her audience it was not apparent from the activity on the screen. Serena was already in situ, now naked and bound like Tania, and she was just finishing the bondage on Alex. Catherine watched the pained and fearful expression on Alex's beautiful youthful face, her blonde locks looking matted and unkempt even before she went through the trough, as Mistress XS affixed the clamps and gag to her niece.

Before long all three girls were being spun gently round, the weight from the chains pulling on 3 clits and 3 pairs of tits with unerring force. Each girl being immersed in the trough of filth before ascending to start the cycle again. Mistress XS had been right � at all times one or other girl was gagging for breath with her head under the surface.

�Now then Catherine!� Mistress XS said turning her back on the spectacle of movement, pain and misery she had created. �We need to talk about my offer to lessen the punishment on Lynne and the rest.�

Mistress XS continued. �I'll do a deal with you. I'll lessen their punishment and that of the girls behind me if you do this next task for me. That isn't much to ask, is it?�

Catherine looked at the girls being immersed one after the other, their distress made plain by the frantic cries and screams of pain as the weights dropped and she knew she again had no choice. She was, by now, at least able to reason and so said, �I'll do it if you promise to stop torturing Georgina as well!�

Mistress XS fixed the camera with her cold grey eyes and said �You're in no position to bargain with me Catherine! Besides, Georgina's already accounted for� she's got a couple of days to recuperate in solitary after she's played with our breast torture fanatic, and then she's booked to entertain a group of our more right wing members in the Nazi Dungeon! Why look, we've even got her knickers and bra drying on the line in anticipation!�

Mistress XS moved over to the washing line the twins had so recently been holding up - now it was strung between the posts to which they had been strapped. Towards the centre of the line Mistress XS pointed to a heavy white panty girdle which had a yellow Star of David sewn to the centre panel with a black triangle over the split-crotch.

The bra hanging next to them had the Star of David centred over each cup with the middle part of the Star cut out so her nipples would protrude! The Black triangle was also prominent on the outside edge of each cup.

With a maternal Jewish grandmother Catherine knew the significance of these symbols only too well; Georgina would be in the Nazi Dungeon marked as a Jewish prostitute!

Catherine shuddered at the thought of her poor sister being presented to the members of Group XS in a Nazi Dungeon.

�What do you want me to do?� She said with an air of resignation in her voice.

Mistress XS smiled. �It's very simple really. You have the dungeon there; all you need now is the Mistress! We've contacted a very good professional Mistress on your behalf and asked her to come over and �entertain' you!�

Catherine looked at the equipment around her and shuddered. �You'll make things better for everyone if I do?�

�I'll lessen their punishments, yes.� Came the reply.

Catherine knew she could say no. But to do so she was now inflicting more pain on so many people� �I'll do it!� She whispered.

�You'll have to speak up!� Mistress XS said.

�I'll do it!� Catherine spat back.

Mistress XS beamed. �Oh good! I knew you would, how wonderful!� she stopped and looked at her watch. �You'll need to get ready for her then. I've promised her on your behalf that you'll be ready and waiting and, trust me, she isn't someone you want to piss off!� Before bursting in to her now familiar evil laugh.

Hearing the laugh, Catherine was about to say �I won't do it!� when Mistress XS added, �Of course if you don't follow through, I can just picture Serena and Alex in the Nazi Dungeon with their mother� they'd be very popular! They might find some of the interrogation techniques used in there a bit extreme � you may recall some of Dr Saavik's techniques from Russia ��

Catherine recalled the tales Tania had told of being �interrogated� by the pair of evil doctors when their paths had crossed in Russia . She had described how they had strapped her to a chair without a seat and used probes attached to the electricity supply to explore her body; they had used a cane on her breasts, cunt and clitoris; they had injected chemical inside her body, into her womb, into her bladder, up her anus and watched with delight as she cramped and contorted in agony. Not in the name of extracting a �confession� � they had that already � but for their pleasure.

Catherine thought of Serena and Alex being interrogated in such a way and knew she could not say no. As if to assuage any doubts, Mistress XS continued, �I'm sure we'll be able to find matching bras and panties to the ones their mother will be wearing� perhaps we'll make them a bit more girly, you know, pink and frilly, but they'll still show them as Jewish sluts and have the punishment spikes on the inside and the hole at the ass so they can be raped!�

�I'll do it!� Catherine said once again to the unreasonable demands of Mistress XS.

�Good!� She replied. �Let's get started then!�