When i was 15yrs i had to stay with my older sister for one week, she was''nt too pleased either. She never really got on with the rest of the family, hardly ever visited. Dad said she had got too big for her boots because of her well paid job and big flat that she owned. She was 27yrs old so i never really remembered her living with us as she moved out when she was 16yrs. She always looked down on us and i never really got on wth her because of her snobby ways.
Anyway circumstances arose where my mum asked if i could stay with my sister who reluctantly agreed.

The week arrived and i turned up on her doorstep, i was''nt too pleased with the arrangement but my parents would''nt let me stay at home on my own. When i got there Kathy my sister sat me down and said ''listen Tommy i don''t want no nonsense from you and you do exactly as you are told ok'' she then told me the ground rules and i was''nt allowed to do this or that, i might as well had been in prison the way she went on.

The one thing that i did enjoy though was that my sister was out a lot of the time and i had developed a fetish for tights and loved to wank with them. And as luck would have it my sister had a whole drawer full of them as she wore them everyday for work.
After a couple of days of being with her i noticed she had a really nice pair of legs and she always had skirts above the knee, up till then i had never really took much notice on the odd occassions i had seen her. But i found myself trying to get a peek up her skirt whenever i could especially in the evenings when we were watching T.V, she had a habit of pulling her feet up on the sofa which made her skirt ride up the back at times and i got a good view of her panties under her tights. I know i shouldn''t have but i couldn''t help getting an erection but it was the tights that caused it. I would have got an erection whoevers skirt it was i was looking up.

But one evening i had a shower and was sitting in my dressing gown when she came home from a night out, she plonked herself on the sofa and kicked her shoes off and started to say what a tiring day she had had and how her feet were aching. She lifted one leg up and started to rub her foot and i had a perfect view straight up her skirt, so good in fact i could see she had white see-through panties under her very sheer tights and could see her triangle of pubic hair.
I''d never had a view of any woman like that before and my cock suddenly came to life and was rock hard in seconds, i moved the cushion from my armchair on to my lap so she would''nt notice as i was also a bit embarrassed. She was chatting away to me but i must have been staring a bit too much as she suddenly shouted at me when she realised where i was looking. She got up and grabbed the cushion to hit me with it and said ''you little perv looking up your sisters skirt''. But as she grabbed the cushion she had also got hold of the belt of my dressing gown and pulled it open and my cock sprang into view!!! ''My god you''ve got an erection as well, you disgusting little pervert'' she shouted. ''Sorry Kathy, i couldn''t help it! It just happened i''m sorry'' i pleaded.
''I''m your sister though'' she said. ''Its not you, its your tights'' i shouted back. ''what'' she replied.
''I would''nt get turned on by you, its because you''re wearing tights'' i answered.
''My tights....you have a thing for tights..is that what you''re saying'' she glared at me.
''Yes i can''t help it...i love seeing women in tights but it always makes me hard, i''m sorry Kathy please don''t tell'' i begged.
''well i suppose everyone gets off on something...but i''m still your sister and i''m the one wearing them so you shouldn''t have been looking'' she said. ''I''m sorry honestly, i''d never had a view like that before but i didn''t get aroused because of you...i swear'' i promised her.
''well ok i won''t tell this time but you will have to learn to control yourself better....you little pervert'' she said.

We stared at eachother in silence for a minute or two then she said ''you are telling me the truth aren''t you, it was my tights and not me''.
''Yes honestly its the tights...i love them..the feel..the look...everything, its not you i wouldn''t get an erection because of you'' i said laughing.
''what''s so funny'' she said.
''Nothing'' i replied.
''There must be...you laughed when you said it wasn''t me'' she answered.
''I didn''t laugh'' i said
''Yes you did, don''t lie...you did...whats so funny about getting an erection because of me'' she looked at me quizzically.
''Nothing'' i said.
''well what''s wrong with me then?...you don''t think i can turn blokes on is that it?...she asked.

I was a bit confused what was my sister going on about i thought to myself, if i said she was sexy i''d be in trouble again so i just looked at her and didn''t say anything.

''well i''m waiting...my clothes are ok...my hair and make-up too...tell me c''mon why did you laugh? she said again.
''I just did, no real reason but.....yeah you are sexy ok. I answered.
''So you could get aroused by me then, not just because of my tights'' She smiled.
''Why do you want to know, you had a go at me before when you thought...you know'' i said.

''Ok i won''t tell you off i promise...but tell me please, its just that i don''t get chatted up like my friends do...guys always go for my friends and i''m left on my own...to be honest i haven''t had a shag in ages''. she replied.

''It might be your attitude, you are a snob and look down on people all the time....and you have always got to be right haven''t you'' i said to her.
''Is that what you really think of me'' she asked
''Its what everybody thinks of you...not just me, you just think you''re better than everybody else, in fact you are horrible at times'' i responded.
''And you think guys don''t chat me up because of that as well'' she asked.
''Maybe...its got to be something like that....its not because of your looks thats for sure'' i laughed.

''My looks...so you do think i''m sexy then?'' she asked.
I looked at her and smiled and said ''i''m not saying..whatever i''d say would be wrong wouldn''t it''
''No come on tell me the truth, i won''t tell you off i promise...i want to know from a male point of view..tell me honestly, imagine i''m not your sister..what would you really think if you saw me in the street''. she asked.

As she said it she slid forward on the sofa which caused her skirt to slide up her thighs and i could see the darker shade at the top of her tan colour tights peeping out from the hem. My cock started to twitch amd my mind wandered back to the view of her see-through panties she was wearing.

''Well come on i promise i won''t tell you off or tell anyone about your fetish for tights'' she said again.

I hesitated then thought why not and said ''well you have nice legs and your skirts are always quite short and you have nice sized tits ok''. As i told her i was looking at her thighs and my cock was getting hard again and i moved my hands on to my lap hoping she wouldn''t notice.
''And what else'' she said.
''what do you mean..what else'' i replied.
''well even boys your age must say more than that when you see a sexy woman...tell me the truth..be as crude as you want'' she said.
''tell me what you really thought and what you saw up my skirt earlier'' she added.

My cock by now was rock hard, i could''nt believe what my sister had just said.
''Well i saw you had white see-through panties on......and tights obviously....also i could just make out your pubes under the sheer nylon'' i said hesitantly.

''carry on'' she said.

''well i''d never seen that before and i....thought you were....well....sorry Kathy.... i can''t say'' i pleaded.
''Yes you can, go on i want to know'' she said.

''I can''t tell you that, its not right'' i replied.

She then said ''you wanted to give me one'' or ''i was fuckable'' are they the words you were looking for''
''Well sort of, yeah i suppose thats it but i''ve never had sex before so i don''t know what its like'' i replied.
Talking like that was making my cock throb even more and i was frightened my sister would get angry again.

She then said ''So if i wasn''t your sister you would want to fuck me then......i bet you have a hard on again now don''t you..........you little perv'' as she laughed.
I nodded my head not saying anything as i was a bit embarrassed but then i was shocked as Kathy lifted her foot up on the sofa just like earlier and i could see right up her skirt again!!!

''Like what you see'' she giggled
''I want you to tell me what you would do to to me.....and have a wank at the same time right now...here in front of me go on'' she said.

''What'' i exclaimed.

''I bet you would love to ram your virgin cock in my pussy wouldn''t you, you little perv'' she laughed.

''No No i couldn''t do that'' i said.

''Yes you can think of me just as a woman and not your sister......imagine touching my legs and feeling the sheer nylon of my tights between my legs...you would love that wouldn''t you'' she giggled.
She threw me the box of tissues and said ''mind the furniture though'' as she started to laugh. She then pulled her skirt right up past her sheer panties and tights as she sat opposite me with her legs spread.
Come here...come closer...hurry up.....its only a one time offer'' she said to me.

My cock by now was nearly bursting, i couldn''t help myself as i threw my gown off and started to wank feverishly as i was staring at her pussy through the sheer nylon that covered it, the fact that it was my sister didn''t matter anymore...she had turned me on so much with her dirty talk.
I knelt on the floor in front of her, my cock pointing straight at her....
''Yes, Yes i''d love to be able to fuck you...you snobby bitch....strip you naked and just leave your tights on while i fuck you senseless'' i shouted.

Within less than a minute i was cumming into the tissue i had grabbed from the box, i seemed to cum for ages and the tissue was falling apart in my hand soaked in my cum.

''well i think you certainly enjoyed that didn''t you Tommy'' she giggled.
Anyway little brother thats our little secret but it won''t ever happen again so don''t get any ideas in the future ok''. Kathy added.

I sat there exhausted ''Ok, but why did you let me do that'' i asked as i tried to get my breath back.

''Lets just say its my way of trying to be nicer to everyone instead of having an attitude as you so kindly pointed out.......and also i have a thing for seeing guys wank over me'' she replied.
She then laughed and said ''see everyone has a fetish of some sort''

Since that day Kathy has been a lot nicer and visits Mum and Dad more often, even inviting them to her flat which she never ever did before.
She also has a steady boyfriend.
We have never mentioned anything to eachother about what happened but i will never forget my first proper wank in front of a woman....even if it was Kathy.