Months have passed, and Mina and Suzy are now fully established sex slaves in their lesbian mother's grand London house.

They are well cared for and have generous allowances for clothes and beauty treatments.

A doctor examines them weekly and gives the sisters a blood test. They are excused from their duties when they have their periods unless a guest specifically requests to use them.

Mina and Suzy sleep together in a luxurious apartment at the top of the house and have everything they need for their comfort.

Sometimes Justyna, the maid, comes in the night, wakes Mina, and takes her away. Often, Mina does not return until the morning, and for the rest of the day, she is quiet and withdrawn.

Their mother holds regular soirees for a small number of female paying guests, and Mina and Suzy provide the entertainment. They perform elaborate sex acts together and are then available for the guests' use.

Often Mina and Suzy perform in lavish costumes, sometimes enacting scenes in which they are tortured and beaten. Justyna often takes part in these enactments.

Their mother takes part in some of the girls' performances, and the action is best described as highly taboo on those occasions.

Apart from their lack of freedom, Mina and Suzy enjoy a happy time. Both girls are naturally sexually submissive, and when skilfully aroused, the painful procedures bring them both exquisite pleasure.

Mina frequently experiences orgasms while being whipped. Suzy is at her happiest when being used anally.

The guests at these soirees are obviously wealthy. The price of admission is exceptionally high. One regular guest brings her own daughter, who is barely sixteen. The girl loves to play with herself while everyone watches.

Then, the girl performs cunnilingus on her own mother, which everyone finds very arousing.

By this time, those guests who are not having sex with each other or Mina and Suzy are openly masturbating.

It was Justyna who first introduced the idea of involving men in the performances. Mina and Suzy's mother, Allegra, was against the idea, having a natural distaste for men.

So she decided to send her daughters to stay with her elder sister in Ohio.

Here the two girls could be trained in all the sex acts that men enjoy and, in time, be used as sophisticated sex toys by both men and women.

Justyna would be travelling with them in a specially chartered private jet. During the flight, the girls have sex, and Justyna arranges for the first officer to watch. He becomes very aroused, and Justyna makes him ejaculate over the girls' faces and naked breasts.

Mina and Suzy realise that things will differ significantly from their time in their mother's home.

The girls are stripped and blindfolded whilst on a long car journey into the hills.

They are climbing into the mountains now. The air smells so fresh and clean.

The car stops, Justyna helps them out, and they feel the cool grass beneath their feet. No basement car park this time!

Their blindfolds are removed as their eyes adjust to the light; before them stands a beautiful woman.

The woman introduces herself as Alex, the girls' aunt and their mother's sister.

Mina and Suzy have become accustomed to being naked with strangers, and none of this seems unusual.

As if to establish her position of control, she instructs the girls to masturbate while she and Justyna watch.

Still trembling from their orgasms, the girls are led into the house, and their new life begins.

They learn that their Aunt Alex is gentle and caring, and she allows the girls to sleep peacefully and not be abused by Justyna.

They are introduced to men. Alex teaches them how to please a man, touch and stimulate him and handle his penis.

Soon the two sisters provide all kinds of services for their aunt's male and female guests.

The Gloryhole is extremely popular. Side by side, in the darkness, Mina and Suzy fellate the stiff, interracial cocks that appear through the wall. They compete to see which of them can get the first mouthful of cum.

Their hands are tied, so only their lips and tongues are used. After an hour in the Gloryhole, their little bellies are swollen with semen.

The climax of one spectacular party is a bukkake session with over twenty men, all naked, masturbating in readiness to shoot their seed into the girls' faces.

By the end, Mina and Suzy's nude bodies, faces, and hair are coated and dripping with silky cum.

The sisters are cared for and loved by Auntie Alex. Even Justyna succumbs to their lesbian skills. And for many months, life is good for everyone.

The parties are more frequent now, and the guests more plentiful. In short, money is rolling in.

Do you not realise? The men and women enjoying Mina and her sister are paying guests, and sexual services of this quality don't come cheap!

In any successful business, knowing when to cash in is essential. And so it is with Alex. She decides to auction her highly accomplished and stunning two girls.

The day of the highly anticipated auction arrives and is, as expected, extremely well attended, and the large room is filled to capacity. Mina and Suzy see many familiar faces; however, some are masked, and there is no clue to their identity.

The two girls are dressed in nothing but the sheerest, black hold-up stockings and six-inch, shiny black heels. Mina's lovely blonde hair is loose, and Suzy's Pixie cut has never looked better.

Both wear discreet make-up on their faces and their vulvas.

They are wearing handcuffs on one hand and are chained to each other, denoting they are to be sold as a pair.

The girl's description in the auction guide reads like a BDSM novel.

Alex leads the girls to the centre of the stage, and the audience gasps as the girls are turned and bent over to reveal their glistening, jewelled butt plugs.

The price of the two girls is rising fast. (Their value, of course, is priceless.) The bidding is fast, furious, and very noisy.

A late bid is made by one of the masked women. There is no counter-bid, and Alex brings the gavel down, and Mina and Suzy now belong to someone else.

The girls are ushered downstairs while the financial arrangements are finalised.

Back in their private quarters, the girls are naturally excited to learn who they are to serve. Their experiences with their aunt's guests have always been thrilling and erotic.

It is Justyna who breaks the news. And both Mina and Suzy scream as they hear the name of their new owner…" Ms Rachel Harper," a cruelly grinning Justyna informs the crying girls that she is now employed by Ms Harper and that the girls are to be taken to her Mistresses mansion in England.

The two loving sisters are now the property of the evil lesbian who cruelly betrayed them and forced them to suffer such disgusting humiliation.

Stripped of their fine clothes and possessions, the two sisters are flown home to the UK.

The girl's daily life once back in Rachel Harper's mansion is a story too heart-breaking to tell.

They are kept in chains in a basement room, and Justyna reverts to her nocturnal habit of waking Mina and taking her away to do God knows what.

Ms Harper's dog is forever prowling and snuffling, adding to the general sense of menace.

Men and women come to the mansion paying handsomely to use the girls.

Ms Harper, with her black Doberman, King, at her heels, is the Mistress of ceremonies, arranging Mina and Suzy's humiliation and abuse. She delights in explaining to the depraved, decadent, and perverted audience in her basement dungeon that their pleasure is not restricted by any limits.

In the final indignity, it's Justyna, the faithful maid, who arranges the ultimate humiliation in what can only be described as a 'Dogging Car Boot Sale.'

The girls are driven to a secluded forest clearing, and, naked except for the obligatory sheer, black hold-up stockings, and heels are paraded in chains. The male and female clientele arriving in expensive cars, some with the excuse they are walking their dogs, pay Justyna for the privilege of unlimited use of the girls.

Mina and Suzy have no choice. Now the property of the evil and sadistic Ms Harper, the use and abuse in her dungeon and the trips into the countryside with the equally evil and sadistic maid Justyna will be repeated again and again...

Unless!