First of all let me introduce myself I'm mark 35 years old just a normal guy this incident happened 2 years ago, my wife Susie and i travelled to the south of Spain to visit her mother and father who now live and work there, also there was my wife's younger sister Katie she had just turned seventeen she's about 5'3 slim figured with raven black hair and an ass to die for I know your not meant to look at your wife's younger sister like that but I'm an ass man and its just perfect as much as you could guess at by looking at her in a bikini by the pool.
As always when you visit family there's always an element of disruption and on this occasion we were told to stay in Katie's room and she would sleep in the single bedroom which was ok with everybody.
On the first evening of arrival we had a lovely meal and then a few drinks, and we were just chatting away and the subject of Katie's love life came into question now my ears pricked up she had been seeing her first serious boyfriend for 3 weeks and all of a sudden she called it off saying he was immature now that got my perverted mind thinking if she was still a virgin or not!
As the conversation continued it swung round to my sleeping habits as in a bomb could go off next to the bed and I wouldn't stir!
We were also laughing about my inability to deal with the heat in that part of the world it just drained me which just meant that I would struggle to rise before ten or eleven am As Susie and myself turned in for bed that night I was feeling extremely horny thinking about Katie and her ass so as soon as Susie went into the bathroom I had a quick look in Katie's wardrobe to see if there was anything of interest, there was the usual sexy thongs etc but there were also some small dildos and anal beads which got my cock solid thinking about her using them.
As Susie walked out the bathroom she liked the look of my cock standing to attention and just climbed onto the bed on all fours she must have been horny as well!!!
So I slid into her with ease while thinking about her sister, now Susie doesn't really like anal she cant get her head round it and thinks its "dirty" she'll let me occasionally play with my finger in her but that's it, as I was pumping in and out of her the image of her younger sister fingering her own ass sent me over the edge and I blasted a huge amount of semen over my wife's gaping pussy and asshole.
I awoke to the sun streaming through the curtains and the feeling of being to hot I got up adjusted the AC and climbed back to bed Susie wasn't anywhere to be seen but she's an early riser and would probably be by the pool catching some rays I must have dozed off because I woke to the sound of movement in the room as I slowly opened my eyes there was Katie looking in her wardrobe which is about 3 feet from the side of the bed for something, she had obviously forgot to take a supply of clothes into her "new" room, as she was stretching up to the top shelf her silk nightdress which was just covering her ass rode to up to give me a perfect view of her lily white ass it always amazed me how she never got any kind of tan living in a country like Spain with her black hair she was almost Goth like, as she finished rummaging at the top of the wardrobe she bent down to retrieve shoes from the bottom of the wardrobe however they must have been stuck or they were right at the back and she had to go on her hands an knees to try and get them which in turn gave me the view I dreamt of her pink pussy lips were slightly parted and her pink anal ring was such a contrast to her white ass and topped of with some black pubic hair I thought I was going to cum right away.
After she got her shoes and stood up I continued to pretend I was asleep I was just waiting for her to leave so I could give myself some relief with the image of her pussy and ass but she seemed to have went quiet and I couldn't sense any movement at which point I heard her taking a step to the side of the bed and the next thing i knew the sheet that was covering my lower half was being gently pulled down over my cock then once again silence for what seemed like an eternity but was probably only thirty seconds or so and the next thing I felt was a warm hand caressing the underside of my hard cock at that moment I had one of the best ideas of my life I gently groaned my wife's name, Katie stopped but as I kept on saying my wife's name she returned to stroking me I wondered how far this would go but just at that I heard a door slam elsewhere in the house and Katie stopped stroking me and left the room boy was I so frustrated but on the upside there was a plan formulating in my perverted brain.
Later in the afternoon we were all lounging by the pool having a beer and of course I was having a look at Katie in her swim wear as well as my mother in law who still looked stunning for her age, after my 3rd beer I let the bottle slip from my hand and started to snore over the next few minutes I heard some whispering between my wife and her in laws and then water was splashed on me I decided to try and ignore this to keep up the deception of being out of it, after another few minutes I felt my sun lounger move and then I was dumped in the pool to much laughter, after I pretended to be in shock at getting dumped in the deep end Katie was swimming next to me so I had a playful grab at her and she tried dunk with put my face right between her legs a mere millimeter away for sticking out my tongue and tasting her.
As we were sitting on the edge of the pool later Katie turned and asked "so you didn't feel us splashing you or moving your sun lounger? " I replied" no I was totally out of it it happens quite regularly I can remember one time your sister said I had a full conversation with her in the morning but I had no recollection of it later in the day!
" she seemed quite surprised by this so I decided to up the stakes "Katie your sister once told me she had lets just say intimate relations with me one morning where I was a very hands on partner but I again I had no memory of this "Katie replied "does it not scare you that you were doing that kind of stuff with no knowledge it " I replied with a smile"I must be enjoying it so that's a no.
After dinner my wife and her mother decided that the following morning they were going to get up early and hit the new shopping centre that had been recently completed my father in law wasn't best pleased as he was going to be the chauffeur on a 2 round trip nobody batted an eyelid when i turned the offer down they new I hated shopping and would probably still be out of it at that time in the morning, however we we were all quite shocked when katie said she was going to stay and do some laps of the pool and chill considering she was a bit of a shopaholic, it was at that point I thought there could be a repeat of this mornings performance I awoke to movement in the room, ever so slowly I sneaked a look and there was Katie rummaging in her wardrobe, and as yesterday she went down on all fours to retrieve shoes from the bottom of the wardrobe which gave me another view of her pussy and ass however I was a little disappointed to find that I was more in the middle of the bed than yesterday so I wasn't as close to take in the fine details After a few minutes I sensed her approaching the bed and then after another few seconds I felt the sheet being removed to expose my semi erect cock she must have been more bold or horny than yesterday because she went straight to jerking me off so I did my part and moaned my wife's name, and to my horror she stopped for what seemed like an eternity but then I felt her climb on the bed obviously my disappointment that I couldn't get a close up view of her earlier because I was in the middle of the bed had worked in my favour because she couldn't get comfortable stretching over to the middle to play with my cock As she settled on the bed I looked to my left and there was her pert ass inches away from my face so I thought to myself I'm not going to get a chance like this again and started rubbing the back of her thighs and working my way up to her already moist pussy, as I started to rub her clit she stopped playing with my cock and eased her leg over my face putting us in the perfect sixty nine position, there I was looking up at this sweet seventeen year old pussy at which point she lowered it onto my face and took my cock in her mouth,now I knew there was no holding back I slowly slid my tongue over her clit and started easing my fingers in her now sopping pussy, after a few minutes of this I decided I was going for it I slid my hand up to her asshole and slowly inserted my index finger and then almost instantly Katie pushed backed while groaning yes!
After I slid another finger in her ass I knew I just had to fuck her right then I certainly wasn't going to last much longer the way she was slurping on my cock so I pulled her back and she just slid her pussy down on my solid cock after ten minutes of fucking I just had to fuck that ass, pretending to keep up the pretence of being oblivious to who I was fucking I said "Susie get on all fours so I can fuck that beautiful ass of yours " which she duly did and I positioned my slick cock against her ring and slipped in with a nice bit of resistance, Katie then started to push back onto me and started getting vocal telling me to fuck her virgin ass now I knew after only a few minutes I was going let go with a massive cum load, just at that Katie started to have her own orgasm at which point I emptied every bit of semen I had in me into her ass.
As we collapsed onto the bed I said "Katie that was the best fuck of my life " she replied" Katie?
What happened to Susie?" With a smile