Life in Hazely Reform School is grim. Every moment of every day is planned out for you. You must get up when you are told to get up, shower when you are told to shower, eat when and what you are told to eat, and work at what you are told to do when you are told to do it.
Add to that the fact that you are always liable to have a cane or a riding crop across your bare buttocks, and you are prevented from even touching your own genitals, let alone from masturbating, and life is about as grim as it can get.
But for Karen Frayn life has unexpectedly taken a turn for the better.
Alone in her bed at night she no longer suffers agonies of sexual frustration: instead she savours the astonishing orgasm Miss Lucy has given her, and looks forward to the next one.
Her father was right: money can buy you everything. And if Karen can have an orgasm like that, well, not every week, that is not possible, but on average every couple of weeks, she believes she will be able to survive her sentence.
Three days have passed since Miss Lucy brought Karen to a pitch of ecstasy the like of which she had never experienced before. There are four more days to go until the next shaving session.
Will she be lucky and get Miss Lucy again? She has no way of knowing. But as Saturday approaches she starts to get an ominous feeling. Maybe it is greedy to want another orgasm so soon. Maybe that would be too much of a good thing. Which is crazy, she realises. Before she was stuck in Hazely she used to have orgasms practically every day: now she is telling herself it is greedy to want two in a fortnight? That shows how she has been institutionalised, how she has started to think that her deprivation is just, that she has no right to another orgasm.
She must stop thinking like that. She has paid - or rather her father has paid - a substantial sum of money. She has the right to as many orgasms as she can have access to.
Nevertheless, the sense of foreboding will not loosen its hold on her: and she is not surprised when Saturday afternoon comes around and she finds it is Matron who is leading her into the consulting room and strapping her feet into the stirrups.
By the following Saturday both her clitoris and her brain are telling her she needs another orgasm. By the time she gets into the Waiting Room she is jittery, a bundle of nerves and sexual tension. She watches anxiously as the girls ahead of her are called in, by Matron and Miss Lucy alternately. She tries to calculate who she will get: but the two of them are keeping time with each other so closely it is impossible to predict.
Then - joy! - the girl ahead of her is summoned by Matron, and just seconds later Miss Lucy appears in the doorway and calls out her name.
Heart thumping she follows Miss Lucy into the consulting room. Once inside she tears off her skirt and knickers and is lying on the couch with her legs apart and her feet in the stirrups before Miss Lucy can lay down her clipboard.
"Someone's in a hurry today," says Miss Lucy, in her slow, caressing, voice.
"God, I've been waiting for this," says Karen.
"I've never known a girl so eager for a shave before," says Miss Lucy.
Karen smiles at her: she knows Miss Lucy likes to tease her.
Nevertheless Miss Lucy seems to be taking her time, spreading the shaving foam between Karen's legs and drawing the razor over her pudenda with no obvious sense of urgency. Karen twitches and sighs: just the touch of the razor is arousing her: she wants to be done, she wants to feel Miss Lucy's fingers inside her again.
"Do try to keep still," says Miss Lucy. "I don't want to nick you with the razor."
"How can I keep still?" breathes Karen. "Oh please, please hurry up."
"I have to shave you thoroughly Karen," says Miss Lucy. "I don't want anybody complaining that I don't do my job properly."
"Yes, but..." says Karen: then she gives up: Miss Lucy will do things her own time, she must be patient.
But she can't stop shuddering as Miss Lucy takes her labia between her thumb and forefinger and draws the razor sideways. And when Miss Lucy moves on downwards and starts to shave between her vagina and her anus, impatience gets the better of her.
"For God's sake bring me off," she gasps: "I'm right on the edge here." And when Miss Lucy doesn't immediately comply, Karen says: "Oh God, I'll do it myself," and reaches her hand down between her legs. Her clitoris throbs in response: but before Karen can start to rub she finds her hand has been grasped and lifted away and replaced at the side of the couch once again.
"Ah ah, Karen," says Miss Lucy. "Against the rules I'm afraid. No masturbation. If anyone cums in here it's under my hand."
"Then bring me off!" says Karen.
"Now Karen, you know the rules," Miss Lucy says. "Payment up front."
"But I have paid," protests Karen, as the razor is pressed into her anus and drawn outwards.
"That was for last time," says Miss Lucy. "If you want to cum again you have to pay again."
"You're teasing me," says Karen irritably: and then she sees the look on Miss Lucy's face and a cold shiver runs over her body: "You're not teasing me are you?"
"Not at all Karen," says Miss Lucy, and there's a steeliness in her look that Karen has never seen before.
"You can't do this," says Karen. "My father paid you five thousand pounds: you promised to give me orgasms."
"Orgasm Karen, singular. And I think I delivered on my promise: at least I didn't hear any complaints from you last time."