My Girlfriend's Younger Sister

All persons engaged in sexual activity in this story are over 18 years of age.

The first three chapters were based on a real event that happened in 1969 that is burned into my memory, when, bear in mind, there was no internet where anyone could readily obtain information as you can today. Only the detailed descriptions have been embellished to make a more readable story (my memory isn't that good). Reading these previous chapters may give you a better insight into the story background. These later stories are some years afterwards, and there is an element of cheating, as well as taboo in this story, so I have left it in the incest/taboo category (although no incest), for want of a better one. If you don't agree with the story elements, you don't have to read it, otherwise, enjoy.

Ch 5

My wife Jayne had just put the phone down from chatting with Sarah, her younger sister.

"Do you want to go to a party next Saturday Pete?" she asked, as she came back into the living room and sat beside me on the sofa, where I was watching the television.

"What sort of a party?" I asked.

"It's the birthday of Christine, one of Sarah's friends, I've met her a few times, so Sarah said we are invited too, if we want to go."

"Where is it going to be?"

"It's at Christine's house, but it's only a short walk from us, so we don't have to drive."

"What about the children though?" I asked, knowing we would have to find a babysitter.

"Well, if we want to go...," she began.

The way she said it, I guessed that she wanted to go and had already said 'yes', so some sort of arrangements had already been made, and asking me was just a polite formality.

"...Mom has agreed to stay at Sarah's and Rob's house to babysit their children and she would have ours there as well."

"Won't that be a bit much for her, four children to look after?"

"No, she says they always behave when it's just her and she loves having them all around her. Anyway, we won't be that far away if she needs us."

"How about Sarah and Rob, what are they going to do?"

"I said they could come and stay here for the night, so that Mom and the children don't get disturbed at whatever hour we get home."

"That sounds like a good idea."

I could see they had it all planned out, which wasn't unusual, as we were all fairly close and often helped each other out. Fortunately, neither Jayne nor Rob knew about how Sarah and I had 'helped each other out' at their Mom's old house a couple of months ago, when we cleared it all out to be sold, but that's in a previous story.

"It all sounds good then and we haven't been to a party for a long time. In fact, as we are not driving, we can both have a few drinks," I grinned, knowing that alcohol tended to increase Jayne's libido and she often became quite 'amorous' after a few glasses. Additionally, not having to worry about the children might make an enjoyable evening, I hoped.

Jayne smiled, "It will make a change, I'm looking forward to it," she said, happily, and gave me a peck on the lips before settling back to watch TV.

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The following Saturday, after we had fed the children, we packed them into the car and took them round to Jayne's sister's house as arranged. They got on well with their cousins and were soon absorbed in playing together.

While Sarah and Rob went upstairs to get changed, Jayne had a short chat with her mom; gave her contact details and made sure she felt comfortable looking after all the children. She said she was fine and told us to have an enjoyable time and not to worry.

Eventually Sarah and Rob came back down.

I tried not to stare at Sarah as she had clearly made a huge effort.

She was wearing a daringly short, green, dress, with spaghetti straps, which had a plunging neckline that showed her curvaceous breasts to their best advantage. The green of the dress (not unlike the colour of the stunning bikini I had ogled over last year on holiday) complemented her red, curly, hair that she had brushed to a lustrous shine. She had matching green shoes with big stiletto heels that showed off her bare, tanned, shapely legs. Her immaculate makeup highlighted her bone structure, and the overall effect made her look at least six years younger, and very attractive.

As the weather was seasonably warm, Rob was dressed casually in light slacks and colourful, short-sleeved, shirt, but he was totally outshone by Sarah's outfit.

"Looks like I have some work to do when I get home if I am going to match that," Jayne said, "wow, you look great sis. I've not seen that dress before."

"No, I wanted to dress up for once and saw this in a shop in town, so I bought it on impulse."

"It was a good impulse," Jayne said, smiling, "what do you think Pete?"

"I err...think it really suits you," I said, lamely, not willing to say in front of everyone how sexy I found it.

"And you of course Rob," Jayne added, "looking good."

While Jayne focussed on including Rob in the conversation, I saw Sarah glance at me for just a fraction of a second and give me one of her looks. I twitched my eyebrows in acknowledgement that I thought I knew what she was thinking, but also knew that was as far as it could go tonight.

"Right, lets get back to our place," Jayne said, "so that we can get ready too."

We all trouped out to our car, Rob putting a small suitcase in the boot before gallantly helping Sarah into one of the back seats and then taking the other himself. It's only a few miles to our house and we were there fairly quickly.

I poured Rob and Sarah a glass of white wine and they made themselves comfortable in the living room while Jayne and I went upstairs to get changed.

"I wish I'd have found a dress like Sarah's," Jayne mused, quietly, as we got ready, "it's really sexy, isn't it?"

She said it in such a way that I knew I had to be careful and diplomatic, "I guess so, but that short black dress, with the sparkles on it, you've pick out to wear is going to make it look like you two ladies are models that have invaded the party. I hope you both don't outdo the birthday girl," I said, trying to attain the right level of complimentary enthusiasm.

"Ha ha," she laughed, slipping some tiny, black, lacy knickers up her long slim legs, "I doubt that."

I watched, my cock stirring as, without a bra, she slid a matching black camisole over her head, the bottom of it just reaching the top of her knickers. She didn't normally wear such sexy lingerie.

I was transfixed, my cock growing by the second as, next, she carefully pulled on a pair of self-supporting black stockings, a pair of black high heels, then stood up straight to look at herself in the full-length mirror.

She glanced over at me, "You're going to catch flies if your mouth stays open like that," she giggled.

I made a step to advance on her.

"Don't you dare," she said, still grinning at the effect she was having, "I didn't go to all this trouble to have it messed up -- well not just yet. Anyway, Sarah and Rob are just downstairs so you can put that thing away," she said, indicating with a head movement, my semi hard cock.

Disappointing as it was, I knew she was right, so with thoughts of what might happen later, I backed off while she slipped her dress on and I finished getting ready myself, dressing in a similar way to Rob.

We went downstairs to see that Rob and Sarah were relaxing on the sofa and on their second glass of white wine.

"Wow, you'd better save yourself for the party," Jayne said, "I am sure there will be lots to drink there."

"Just to get us in the mood," Rob said, finishing his glass before standing up.

"Are we ready to go?" Sarah asked, leaving her glass of wine almost untouched.

Both girls sensibly changed into some flat shoes and carried their 'heels' in a bag, for the ten-minute walk to the house where the party was being held. Rob and I also had a bag with some wine and beer as contributions to the event, and we set off.

It didn't take long to get there, and there was no mistaking which house it was, as we could hear the music from some distance away. I hoped that they had invited the neighbours!

We joined a few other couples jostling to get in and were soon inside amongst a large crowd of people that looked as though they might be partying well into the night. The only lights in the large open-plan room that we found ourselves in were what I thought were probably 'Christmas tree lights', strung around the walls, so it was quite dim.

All the furniture had been pushed against the walls and it looked like the carpet had sensibly been removed leaving a large area in the centre for dancing.

Christine, or 'Chris', came over to greet us, and after we had kissed, had a bit of 'small talk' and said all the ritual 'Happy Birthday', stuff, we were directed to the large kitchen and conservatory at the rear of the house, where there was a vast quantity of various drinks, sandwiches, pizzas, savoury snacks, etc. and told to just help ourselves.

"Looks like this is going to be fun," Rob shouted at me, over the music as we got ourselves beers, some drinks for our wives, and made our way back to the open area.

"Yea, it does," I replied, surreptitiously looking round at all the scantily clad ladies of all ages, who were already dancing in the open space.

It didn't take long for the two sisters to join in the dancing. They danced together, as they often did at the beginning of the evening, before Rob and I had built up enough courage with a few beers to lose our inhibitions and join them. So, we stood watching, sipping our beers and exchanging a few words with some of the other guys that we knew, who had the same idea.

The evening wore on, with more beers and several more drinks for Jayne and Sarah until eventually they managed to drag us onto the crowded dance area. Someone had switched off some of the brighter chains of lights leaving just the dim, twinkling, coloured ones, to provide a more discrete atmosphere where no one could really see what anyone else was doing.

I have to admit that I am not much of a dancer to some of the faster music, but I can shuffle around fairly successfully with the best of them when it comes to the slower numbers.

Whoever was putting on the music had calmed it down, playing smoochy songs, inducing people to cling to each other and sway together, some of whom had come as a couple and some who had just met.

Jayne and I were together, her arms round my neck and my hands on her bottom, pulling her tightly against me as we rotated slowly round to the beat of the music.

I could feel her bra-less small breasts and hard nipples pressing into my chest and her thighs moving against me through the thin dress she was wearing. I knew she could feel my cock, which had unsurprisingly become erect, pressing against her mound through our clothes. She had clearly had a drop more to drink that she was used to and was moving her body against me in a subtle, vertical, dry hump.

We kissed and she put her tongue in my mouth letting me taste a mixture of whatever she had been drinking. It wasn't unpleasant and I am sure she was tasting me in the same way.

"Mmmm, I cun feeeeel you're hard, right against my puuuusy," she said, into my ear, slurring her words.

Along with hearing her slurred words, I knew that she rarely used words like 'pussy', so I guessed it was the alcohol making her talk that way. It was arousing to hear her talking like that and it often led to uninhibited sex later where she would just let go, and I was hoping that was going to be the case.

Although I had drunk a few beers along with Rob, they hadn't affected me as much, and I thought it best if we sat down for a breather to let my erection go down and I could get Jayne a soft drink before she overdid it.

As it was so dim, I hadn't seen where Rob and Sarah were, but now it seemed they had the same idea as we ended up siting next to them. However, when I saw them, I realised that of the two of them, it was Rob who was the worse for wear and Sarah was holding her own.

"Is Rob ok?" I asked Sarah.

"Yea," she said, "as you know he normally only drinks a couple of beers, but for some reason he has had a few glasses of whisky too, and they weren't pub measures," she grinned.

"How about you?" I asked her.

"Oh, I'm ok, a bit 'merry', but at university I used to go out with a group on 'pub crawls', and I know it's probably not good, but I seem to be able to handle more than Rob these days," she grinned.

We sat there for a short while cooling off and trying to see who was dancing with who and where their hands were, but it was difficult to see much in the low light.

Suddenly, Jayne stood up, a bit steadier on her feet than before, "I want to dance again, come and dance with me Rob," she said, grabbing his hand and hauling him up. Without much choice, Rob somewhat reluctantly was pulled to the dance area with Jayne.

I watched them move into the shadows, cling to each other, and then they were lost in the rest of the people. We had danced with each other's partners before on holiday, so it wasn't anything new.

I looked at Sarah, "Well, looks like we should copy them," I said, taking her hand.

We followed them, and without thinking, I assumed the same hold as I had with my wife. Sarah didn't object and put her arms round my neck, resting her head on my shoulder, while I put both hands on her tight bottom.

As soon as I felt her larger breasts against my chest and her thighs against mine, well, talk about instant erection... I was hard again and pressing it against her, Sarah reacted by adjusting her position so that my cock was pressing against her mound, just as it had been with Jayne. I pulled her as tight as I could against me, not sure if I could feel, or was imagining that I could feel, the indentation of her pussy lips along my hard cock.

"That feels nice Pete," she purred, "and in public too."

There were a lot of couples doing the same thing, so I didn't feel we were 'on show' in any way, and made the most of it, grinding my body against her and feeling her reciprocal actions to the rhythm of the music.

I manoeuvred her into a relatively darker corner and having made sure I couldn't see Rob and Jayne, kissed her, slipping my tongue gently into her mouth and feeling her accept it and suck on it, then interweaving her tongue with mine. I knew we couldn't do much more, but it was very sexy and exciting, so we stayed that way during a number of songs.

As we rotated in the time-honoured way of 'slow dancing', I glanced around occasionally looking for Rob and Jayne, and on the last occasion, saw them in the dim light moving away from the dance area to sit down.

"Looks like Rob and Jayne have had enough," I said to Sarah, turning her so she could see them.

She giggled, "Ohh, poor Rob looks as though he has passed his limit," she said, "maybe we had better see how they are doing."

Reluctantly we separated and made our way over to them.

"What time is it?" Jayne asked sleepily when we reached them.

"Just after 1am," I told her.

"Oh God, I'm sorry but I think it's time we went home," she said, "I'm not used to this."

I looked at Sarah and she sort of shrugged 'ok'; I think we were all a bit tired by now but had had a fun time. I looked round to see if Chris was about so that we could say goodbye, but couldn't see her, so we decided to just leave, and Sarah would call her in the morning to say thank you.

I found Jayne's and Sarah's flat shoes which they changed into, Jayne more unsteadily than her sister and needing a bit of help, then we made our way out into the street. Jayne led, followed by Rob and when we got out there, we found it was much cooler than when we arrived.

"Brrrrr," Jayne said, "maybe I should have brought a coat."

Rob immediately put his arm round her shoulders, pulling her to him, "Sssss'ok, I'll keep you warm," he said, drunkenly, and they set off in the direction of home.

Seeing that Jayne had let him, I wasn't too bothered and did the same with Sarah.

The windows of all the houses we passed were dark, and it was very quiet. I had to keep shushing Rob and Jayne, who seemed to be laughing and talking very loudly about nothing in particular. It seemed to take longer to get back home than to get to the party, but eventually we made it and as Jayne couldn't get her key into the lock, I had to move them, still holding onto each other, away from the door so I could open it.

"I need a pee," Jayne announced, once we had all got inside, and steering a slightly crooked path, took herself off to the bathroom.

I only put the dim wall lights on in the living room, as it made it a bit cosier, and I didn't think anyone wanted the glare of the main lights in their eyes.

For some reason, Rob plonked himself down on the central cushion of the three-seater sofa and seeing this, Sarah chose to sit in one of the large comfy armchairs. I put on some soft, relaxing music and having asked around, I went into the kitchen to make some coffee for us all.

I heard Jayne come back down the stairs while I was putting the mugs of coffee on a tray and glimpsed her walking a bit unsteadily into the living room.

When I took the tray very carefully in there and placed it on the low table, I was surprised to see Jayne was sprawled sideways, a little untidily, her dress rucked up high on her thighs, on Rob's lap. I looked at Sarah to see her reaction, but she just shrugged, a hint of amusement on her face at her sister's and her husband's inebriated antics.

"Are you going to be ok like that?" I asked Jayne, a bit surprised at her unusual behaviour.

"Ohhhh yessss," she mumbled, "I'm sitting with my favourite brother-in-law."

"Thaaat's because I'm your only brother-in law," Rob slurred.

"Yeess, I know that, silly."

They both burst out laughing loudly at this very old joke, another sign of their drunken state.

"And I love you jusssst like a brother," Jayne added.

I gave Sarah her coffee and sat down in the other armchair with my own, wondering what the other two were going to amuse us with next.

They didn't touch their coffee, but Jayne gradually relaxed against him until her head was on his shoulder, her long legs drooping down to where her now shoeless feet touched the carpet with her eyes half closed. Rob had one arm round her waist stopping her from sliding off and the other resting on her stockinged knee.

Like Sarah, I wasn't very bothered by it as it was clear it was all alcohol fuelled.

From where I was sitting, I could see a long way up Jayne's short dress, past the top of her stockings to a flash of white thigh, and a small part of her lacy black knickers that I had watched her put on earlier, and I could feel my cock stirring at the sight.

Suddenly, Jayne opened her eyes, "You two look lonely over there," she said, "you should go and keep him company like Rob and me here," she managed, pointing roughly in Sarah's direction, "it's only fair."

I looked at Sarah who again gave a small shrug before getting up and coming over to sit on my lap, her back facing her husband and Jayne.

"That's better, now we are all the same," Jayne said, with a logic all her own, and lay back onto Rob's shoulder and closed her eyes.

When she sat down on me, I had done the same as Rob and could now feel the warmth of Sarah's body on my arm and hand, and her warm bottom resting directly on my cock, the closeness of which made my cock even more active. Knowing I couldn't be seen by the other couple, I began to slowly stroke Sarah's exposed inner thigh with my hand.

I was paying more attention to Sarah than Jayne, but out of the corner of my eye, I saw a slight movement and when I looked more closely, I could see that although they both had their eyes closed now, Rob's arm that was round her waist had moved upwards and his hand was slowly stroking the underside of Jayne's left breast. As I watched, I was sure his fingers were stretching upwards teasing her nipple too.