My Sister Gets Me to Show Her - Cover

My Sister Gets Me to Show Her

Copyright© 2021 by Vanessa Evans

Chapter 6

Fiction Sex Story: Chapter 6 - My 18 yo twin sister decides that she's an exhibitionist.

Caution: This Fiction Sex Story contains strong sexual content, including Consensual   Fiction   Incest   Exhibitionism   Public Sex  

As mentioned before, both Alice and I are on the same psychology course and we were both looking forward to the human sexuality part of the course. We’d been told that we’d have modules on it in each year of our course, getting deeper and deeper into the subject in each subsequent year.

Well we had to wait until the early new year for the first module and we were told that we’d be doing things that were designed to really look into our own beliefs and attitudes towards human sexuality and that we would take part in scenarios where we would have to question our beliefs and attitudes, and those of other people.

When one girl on the course asked what exactly they would have to do the tutor replied,

“Well Charlotte, I know that at least one girl in this room isn’t wearing underwear (he was looking at Alice and I looked down at her lap and saw that her knees were a few centimetres apart), and there are social stigmas around that subject but what if I told you that for next week’s class I expect all of you, girls and boys, to arrive here without underwear on, or even naked so that we could analyse each other’s feeling about being naked in the classroom.”

That statement, unsurprisingly, got a few murmurings from a few of the now very wide awake students.

“You’re going to tell us to arrive at class naked, totally naked sir?”

“I might, would that be a problem for you Charlotte?”

“I, I, I don’t know, probably.”

“Well Charlotte, take a situation five years from now where you have qualified and you are having a consultation with a patient who is clearly a closet exhibitionist but can’t come to terms with that. How could you expect to help them if you have never even tried it yourself?”

“You have a good point there sir.”

“Yes Charlotte.”

“Sir,” a student called Rob asked, “is it true that in a lot of American states it is compulsory for all students to spend at least one educational week totally naked, both in and out of their education facility? And that it is permitted for other students to explore the naked person’s body?”

“That’s a good point Rob. There is a Naked in Education Facilities (NIS) program in America, do you have any idea what that program is all about?”

Multiple people suggested reasons, the main ones being:

Promote self awareness.
Prevent body shaming.
To stop boys objectifying girls.
Hopefully result in less rapes, sexual attacks and pregnancies.

“That just about covers the main objectives, and do you agree with the American authorities that those objectives are a good idea?”

Everyone agreed, some elaborating on the benefits of one of the items.

“And is it also true that the naked students have to submit to ‘Reasonable Requests’? Rob asked.

“Yes Rob, but it is down to each education authority to define what is reasonable and what isn’t.

“Do you think that the education authority in this country will see the light and implement a similar program in this country?” One girl asked.

The response from just about everyone was laughter then the tutor said,

“Unfortunately the authorities both in this country and this university are a real part of the problems with society’s attitude to human nudity. And for that reason I cannot ask you to come to next week’s class totally naked so we will have to confine our research to one person getting naked in this room. So next week I will be asking for a volunteer to strip naked in the middle of this room so that we can explore the feelings of both that person and everyone else in the room whilst we look at the said volunteer. Also, I encourage you all to take part in naked in public scenarios when there were no children around and for you to make a note of the reactions of the people around you.”

One guy replied,

“Why only when there are no children around because I would have thought that children would just take it in their stride as being part of life.”

“You are right Andrew but the problem, well one of the problems, with society is that so called well meaning adults want to protect the younger generation from the real world which is probably the reason why there are so many sex related attacks in the country.”

Just then the tutor’s watch started beeping and he said,

“Okay, time’s up, see you all next week and think about volunteering.”

Everyone started leaving and Alice went to the tutor and told him that she would volunteer to get naked the next week.

“Thank you Alice, I thought that you would. You are obviously comfortable with your body so thank you, it is much appreciated.”

As we walked to out next class Alice said,

“I can’t wait for next week, all those guys staring at my body.”

“Most of those guys will have already seen your pussy Alice,” I replied.

“True, but being naked in front of them is soo much better, I’ll probably cum just looking at their faces.”

“Knowing you dear sister, you probably will.”

A couple of times during the next week Alice mentioned that she was looking forward to getting naked in our class and each time we ended up fucking minutes afterwards.

The big unveiling day arrived and I’d noticed, but didn’t comment on, that when she got dressed that morning she’s put an a bra and G-string, albeit both totally see-through and it was an excited Alice that walked into the classroom with me and we took our usual seats.

When everyone was there the tutor started talking.

“Good morning everyone, if you remember last week you will know that today I am going to ask for a volunteer to strip naked so that we can discuss and explore the feelings of both the naked person and the observers to try to establish why society is so against nudity.

I am sure that the vast majority of you are sat there with heightened heart rates and also fear at the thought that I might ask you to volunteer. Some of you will also be sexually aroused at the thought of seeing a naked person in front of you or that in a few minutes you might just be that naked person in the middle of the room.”

The tutor paused there for a few seconds probably to let the fear and sexual arousal increase, then he continued,

“Well, I’m sure that some of you will be pleased and some of you will be disappointed when I say that one person has already volunteered and I have accepted Alice’s offer to be the lucky person, so Alice, would you come to the front of the room please?”

Alice stood and walked to the front while I looked around the room at the faces that were showing a mixture of feelings. I noted that two of the girls did look disappointed.

“Before I ask Alice to disrobe would any of you care to describe your feelings from when I started talking?”

Jeremy was the first to speak,

“I’ll admit that I was excited at the thought of being in Alice’s position but at the same time I dreaded the embarrassment that I knew that I would have.”

“By the embarrassment do you mean by being naked or by having an erection whilst being naked Jeremy?”

“Both I guess, being naked would have been embarrassing enough but to have an erection as well would have been doubly embarrassing.”

“Thank you Jeremy, now would any of you girls like to share your feeling from when I first started talking.

It was Mary that spoke,

“My feelings were similar to those of Jeremy, obviously not the erection part but I was aroused at the thought of being stood where Alice is stood right now. I would have been mortified if you had asked me to ‘volunteer’ but at the same time I would have been aroused.”

“Thank you Mary. Now, how many of you felt relieved when I said that Alice was going to be our subject?”

Just about everyone’s hand, including mine, went up. I noticed that a couple of girls didn’t put a hand up.

“How many of you felt some disappointment when I said that Alice was going to be our subject?”

I noted that all the hands that had been up went down and that the two girls who’s hands didn’t go up now went up.

“Good,” the tutor continued, “you will be pleased to hear that I have had similar responses from this session in other years. Yes, society has conditioned us to believe that being naked in front of people is wrong, but as with everything there are people who do not agree with society and can see nothing wrong with nudity, after all, we were all born naked and all naked bodies are basically the same. Now, let’s turn to our volunteer, Alice, would you like to share why you volunteered?”

“I can tell you but I’m not sure that I understand it.”

“Okay Alice, lets start with telling us.”

“Well, a few months back I had the urge to show my naked body to my brother. Of course, being of the same age as me there had been hundreds of times that we’d seen each other naked and never thought anything of it but that time I felt different. I guess that I was looking for some sort of approval that my body wasn’t ugly that I was normal.”

“And did you get that approval Alice?”

“Yes I did, but I also got something that I wasn’t really expecting, arousal, sexual arousal.”

“So was sexual arousal new to you at that point in your life Alice?”

“No, I guess that like all girls I had discovered what we have between our legs but that time being naked in front of my brother was different, I realised that not only did I like my brother seeing me naked but I wanted other men to see me naked.”

“Isn’t that one of the main trait of an exhibitionist?” One of the guys asked.

“Yes Tony it is.” The tutor answered. “So Alice, you sound to be saying that you wanted your classmates to see you naked, is that right?”

“Yes I guess that it is.”

“What about sexual arousal Alice? Did you get sexually aroused last week when you volunteered?”

“I did.”

“And when you walked into the classroom this morning knowing that I was going to tell you to take all your clothes off? On a scale of one to ten how was your arousal?”

“Six.”

“And when I asked you to come to the front of the class?”

“Eight.”

“Okay Alice, from a purely educational point of view, let’s see if that number increases when I ask you to take your dress off.”

“Now?”

“Yes Alice, please take your dress off.”

Alice did and I thought how magnificent she looked, even if she did have a bra and a G-string on. I noticed that she tuned her back to everyone, showing her bare butt, as she folded her dress and put it on the nearest chair.

“Thank you Alice, I see that you are wearing underwear today even though you normally don’t. Was that you trying to tease your classmates?”

I immediately realised that Alice had been giving unintentional (probably) flashes of her tits and pussy to the tutor every time that we’d been in that room.

“I think that that must have been my subconscious.” Alice replied.

“So we’ve established that so called ‘flashing’ can be deliberate and accidental and that sometimes the person doing it might not be consciously doing it. Now the underwear please Alice.”

Alice stood facing everyone and first unfastened her bra and took it off then she pulled on the strings on both sides of the G-string and holding just one let the rest of the garment fall and hang from the side that she was holding. Then she placed both garments on top of her dress.

“Thank you Alice. Now everyone please can you tell me what you observed just now?”

“Alice didn’t hesitate.” One guy said,

“Yes, Alice is obviously not shy and didn’t need to find the courage to do it, unlike most people who find themselves in that situation. Anything else?”

“Alice was wearing see-through underwear so we could see everything before she took them off.” One of the girls said.

“Correct, there are two things there, firstly, a lot of girls, and some men, put on their favourite, and dare I say, ‘sexy’ underwear ‘just in case’ someone should see them. In Alice’s case she she actually wore underwear which is not normal for her, is that correct Alice? (Alice nodded) knowing that she would be taking her clothes off and subconsciously wanting to look ‘sexy’ when she did so. Secondly, Alice chose to wear see-through underwear. That too was probably a subconscious decision to let people see the parts of her that are normally hidden and to make her more attractive to the opposite sex.

Both these things are part of human nature to attract the opposite sex but are suppressed by society’s obsession with keeping one’s body covered.

“Did anyone observe anything else?”

“Yes,” Tony said, “All the girls that I have seen take their knickers off turned their backs to me when they did it and then turned to face me covering their tits, sorry breasts, and pubic area with their hands, yet Alice didn’t.”

“Yes Tony, studies have concluded that there are two reasons for this, firstly, and the most popular theory is that women put a greater emphasis on hiding their pubic region than their buttocks, but the other theory is that a lot of women like to show off their buttocks. If you were to ask all the girls in here I’m sure that you would get a fair mix of both answers. Alice, why did you not turn around?”

“Because I prefer people to see my pubic region rather than my butt, men have butts too so seeing my butt is no different to them looking in a mirror.”

“Alice, I’m one hundred percent sure that every man, and some of the women in here will find your buttocks a lot more pleasant to their eyes than their own.”

“I certainly do.” Tony said.

“Yeah, that’s because you are a fat bastard Tony.” I thought.

“Okay, let’s get back to the purpose of this module, without being crude, who would like to tell us all what they see when they look at Alice?”

It was one of the girls, Andrea that spoke first,

“An average young woman’s body.”

“Expand please Andrea.”

“Well average height, shoulder length hair, slim, smallish breasts, no pubic hair.”

“Okay, lets look at her breasts, yes they are smallish, an ‘A’ cup I’m guessing but what about the shape of them?”

A few people contributed with answers,

“Small.”

“Firm.”

“No sag.”

“Slightly conical in shape.”

“Hard nipples.”

“Small areolae.”

“Okay, I think that that’s enough, yes, you are all right. There is no such thing as the ‘average’ breast, all are different, sometimes both breasts on the same woman are different. People, both men and women can easily become obsessed with the size of breasts, some believe that it’s ‘the bigger the better’, others prefer smaller, more manageable breasts...

Remember that the primary function of breasts is, to provide food for their offspring, small breasts will do this just as good as large breasts, when a woman gets near to giving birth her breasts will grow to the required size to feed the baby then shrink back to their previous size when the woman is no longer feeding her offspring.

Also note that small breasts, including ones that have been used to breastfeed will start to sag if the muscles in the breast are not exercised, it’s like the old saying goes, ‘use it or loose it’.

As you observed earlier Alice was wearing a bra, something that I am sure that some of you will have observed that she rarely does. You will have also noted that the type of bra that she wore provided her with no support, it was there for cosmetic purposes only, part of Alice’s attempt to make her more attractive to men when she is undressing.

Bras serve two purposes, firstly to provide support for women with large breasts, and secondly for social reasons. All you girl will have been told by your mother’s that you should always wear a bra. Apart from the reason just mentioned the reason is that society doesn’t like nipples making bulges in outer clothing, although this idea is slowly changing.

Like the penis, the owner has very little control over the state of the said organs, but unlike the penis which shrivels when cold, low temperatures make the nipples go hard. As you can see Alice’s nipples are erect so she is either cold, and if that is the case I apologise Alice, or she is aroused.”

The tutor paused for a couple of seconds so Alice said,

“I’m not cold.”

“Okay Alice, I’m pleased to hear that. Now moving down, you see that Alice has a slim waist. Over the years, on average, waists have got bigger but that isn’t a real problem, What is a problem is when people put on so much weight or go so slim that their weight is a medical problem. I am sure that over the years you will all need to deal with people who eat too much or too little. That will be covered in a later module.”

Alice interrupted saying,

“Could hypnosis be used to solve either of those issues?”

A big grin appeared on my face and I looked over to Alice and saw that she was looking at me.

“Yes Alice, that is one possible solution but not all people are susceptible to hypnosis. Have you been hypnotised Alice?”

“No, I doubt that it would work with me.”

I was still smiling when the tutor said,

“Moving down, the pubis. As you can see Alice shaves hers, as do the majority of girls, and some men do these days. There are hygiene issues with both shaving and letting it grow, more so with people with lots of pubic hair, it is an individuals personal choice. Alice, would you care to share the reason why you shave yours?”

“I don’t shave mine, I used laser treatment to remove it permanently but there were four reasons for doing it, personal hygiene, I didn’t like the sweaty feeling, oral sex, I’d hate for a boyfriend to get a hair stuck in his teeth, I don’t like the idea of my clitoris or vulva being hidden and finally because I think that I look better bald.”

“All valid reasons Alice and all ones that go towards the definition of an exhibitionist which you admit to being.”

“I do.”

“As you can all see, unlike men, there is not much for anyone to see round Alice’s pubis and what there is to see doesn’t increase in size dramatically when the person gets aroused, unlike males. This is the main reason why it is more socially acceptable for a woman to be seen naked than a man. An engorged clitoris is deemed to be less threatening than an engorged penis, an assumption that I disagree with because, as I mentioned before, men cannot control when they get an erection and if they have one it does not mean that they are a threat to anyone. You need to look between a girl’s legs to see her genitalia, Alice, would you sit on that desk, lay back and spread your legs please?”

Alice did, propping herself up on her elbows so that she could see everyone, and she spread her legs very wide apart. I thought that there was a good chance that Alice wouldn’t be able to stop herself from having an orgasm and I wondered if she’d try to conceal it like I knew she could.

“Right, now that you can see Alice’s genitalia you can see her arousal. Having seen Alice’s vulva a few times before I can testify to the fact that she is aroused, her labia is larger than when she isn’t aroused and, although you probably can’t tell, I can testify to the fact that her clitoris is larger than when she isn’t aroused.”

“Yes,” Harry said, “I guess that standing at the front of the class every lesson does give you the opportunity to see her pussy, sorry, vulva every lesson.”

“Moving on, one of the other things that you have probably noticed about Alice’s vulva is that she has no inner labia and before she opened her legs you could see nothing other than her outer labia and her clitoris sticking out between the two halves. Only a relatively small number of women are like this, but I remind you that all people are different. If all the young men in here were to allow us all to compare their erect penis’ we would soon realise that everyone of them is different from the others.

Back to Alice’s vulva, as you can see there is copious amounts of vaginal lubrication leaking out of her vagina which isn’t fully closed due to her arousal. The female sex organs as so much more complex than the male ones.”

Just then it all became too much for Alice and we all heard her moan as the orgasm that had been building since she awoke that morning, exploded out of her. Her body tensed up for a couple of seconds then relaxed and started shaking.

There was deadly silence from all but Alice as they all watched Alice go through the throws of her orgasm then slowly return to normal.

“Well, we all know what happened there, did any of you notice that Alice’s vagina had opened even more and that her vaginal muscles were contracting and relaxing as she was having her orgasm?”

“Yes.” Eight people replied.

“And would anyone like to explain that to the rest of us?”

“Yes,” Harry said, “when the female brain is expecting sexual intercourse to occur it sends signals to the vagina telling it to excrete the liquid that we saw to facilitate intercourse more easily. The muscle contractions are also a result of messages from the brain and they are designed to try to hold on to the penis and pull it further into the vagina so that when ejaculation occurs the sperm has a better chance of fertilising the woman’s eggs.”

“That’s a very good explanation Harry, especially from a man, and is near enough for the purpose of this course. Yes ladies and gentlemen, although Alice’s brain couldn’t possibly have been expecting sexual intercourse to take place her arousal was so great that she orgasmed just like she would if intercourse was happening.

You may be wondering how it is possible for Alice to have orgasmed without any physical contact, well arousal and orgasms are triggered by a state of mind. Indeed it is also possible for a woman to orgasm without any arousal, there is a little know condition that some women suffer from, although I’m not sure that ‘suffer’ is the right word, whereby a woman can have spontaneous orgasms at literally anytime both with and without any stimulation. This condition is known as ‘Persistent Genital Arousal Disorder’ or PGAD for short. I once knew a girl who had this condition and she told me that it was both a curse and blessing. At that time the only know cure was rather drastic, removal of the clitoris, which she refused to consent to.”

When the tutor said that there were audible groans from around the room.

“Back to Alice,” who was still laying there propped up on her elbows with her legs wide apart, “you may, or may not be pleased to hear that we have finished the practical side of this lesson but back at the beginning of the lesson when I told you that Alice had volunteered I noticed that some of you girls looked disappointed. Apart from the obvious wanting to see a member of the opposite sex naked, I suspect that some of you actually wanted to be at the front in the position that Alice is right now, but were too shy to quickly volunteer. Studies in the past have concluded that women are less likely to be embarrassed or nervous about being naked in front of men, and that they adapt to being naked in front of men quicker than the other way round. The studies concluded that this was because men’s arousal is more obvious than that of women, or to put it in simple terms men are embarrassed about getting an erection whereas a woman’s moist vulva isn’t that obvious if she keeps her legs closed.

So you may be wondering why it is that society dictates women should be clothed all the time, especially when a lot of men have breasts as big as some women do and we all have nipples. Going down to the nether regions, women have a lot less to see when they are standing, in fact if the woman hasn’t removed her pubic hair that is usually all there is to see, pubic hair, and we all have, or had that. That question is a conundrum that I do not know how to answer but as a psychologist, from time to time, you will be expected to use therapy to treat patients to come to terms with, and live with, not only what society dictates but what people have both inflicted on others and been victims of unwanted assaults. I just hope that what you have learned today will help you understand the needs of the human body better.

Okay everyone, I think that we have all learnt a lot this morning and that your own arousal lever decreases ready for your next class, but before you leave would anyone like to tell us all what you think of the idea of a program similar to that of the American NIS program being implemented here in the UK?”

“A brilliant idea.” Mary answered.

“Who agrees?” The tutor asked and all hands went up.

“I too agree, but I can’t see it happening and I’m sure that I don’t need to go through the reasons. But looking on the bright side, it will keep some of you in work when you get your degrees and go into practice as some sort of psychologist. Okay, next week we will try to work out why people murder other people. Enjoy the rest of your day, and Alice, thank you for helping us out today, I’m sure that all the students, and myself, thank you for making the lesson so much easier and entertaining, you may get dressed now, unless you intend to go to your next class like that.”

Alice got off the table and put just her dress on as everyone watched her. She picked up her bra and G-string, carried them to her desk and put them into her bag then sat down.

“Okay class, that’s it, you may leave now.”

As Alice and I walked out I could tell that Alice was still as horny as hell and we were both extremely happy that we didn’t have another class until the afternoon. We almost ran back to the apartment.


Having said that the last interesting event didn’t take place until the early Spring reminded me that I haven’t told you about either Imogen’s desire to use Alice’s body, or the apartment’s Christmas party. I’ll start with Imogen.

Imogen expressed a desire to be able to manipulate Alice’s naked body and abuse her pussy like she had done before. The problem was that Alice had been pretending to be in a hypnotic state when that had happened but shortly after that I had let it be known that Alice’s fictitious, unpleasant past had been erased from her memory and that she was now happily back to her old, slutty dressed self.

Alice and I had to decide if she was going to be in a fake hypnotic state or be her true self when we invited Imogen up to abuse her body. We discussed the pros and cons and Alice decided that she wanted to be her true self.

The next time that I saw Imogen I took her to one side and explained that as Alice was back to her old self I had discussed with her the Flexi-Doll scenario and together we had watched a couple of the videos. At the end of the second one Alice had stated that she wouldn’t mind being one of those girls. I told Alice that I had offered to role play but the videos that we had watched had girls doing the manipulation and abuse so she wanted to try it with a girl. We had discussed how we could make that work and I had suggested you Imogen as everyone had seen that you also sometimes don’t wear underwear implying that you might be game for that type of fun. As I am usually the ‘Mr. Fixit’ for Alice I told her to leave it with me. Are you still interested Imogen?”

“Hell yes, your sister has a sweet pussy and I’d like to taste it again.”

“Okay, come up to my apartment on Friday at 7 p.m.”

We left it at that and I went and told Alice that it was on for the Friday.

A few things that had happened in the past had led me to believe that Alice liked girls as well as boys and Alice’s excitement during the rest of the week led me to believe that I was right.

At 7 p.m. on the Friday Alice and I were sat in my apartment with drinks in our hands when we heard the lift ping. We’d left the door open and when Imogen walked in I offered her a drink. She put down the bag that she was carrying, took the drink and sat opposite Alice and myself. She didn’t cross her legs nor clamp her knees together and I could see that she was knickerless. Alice spoke about the plan first,

“Imogen, I don’t know how the subject came up but Archie tells me that you’ve watched a FlexiDoll video and that you wanted to make a similar video yourself.”

“That’s right Alice, and Archie tells me that you are the same and that is why I am here.”

“Good,” Alice replied, “I’ve never done anything like this before so I’m nervous and don’t really know how to start or what to do.”

“Okay ladies,” I said, “let’s start by finishing our drinks then Alice can play the part of the doll and Imogen the owner. When that comes to its natural conclusion we can reverse the roles and start again.”

“Oh, I didn’t know that we were going to reverse the rolls,” Alice said.

“Neither did I.” Imogen added. “I mean, I’d end up naked as well.”

“Is that a problem for you Imogen?” I asked.

“I guess not, I just wasn’t expecting it.”

“I won’t be upset if you are wearing granny knickers Imogen.” I said.

“I’m not wearing any knickers Archie.”

“Well that’s one vision I won’t have to try to erase from my memory.” I said then qualified it, “the granny knickers that is.”

We finished our drinks then I told Alice to go outside to the hall and shut the door.

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