My wife’s sister recently separated from her husband following a very nasty and violent marriage that lasted only four years; this resulted in her moving in with us. I shall refer to her as Laura in this true tale, and to my wife as Tricia. Laura is now twenty-five, but I have known her since she was nine or ten. Laura is fourteen years younger than Tricia is, and I have always looked at her as not only my wife’s sister, but as my little sister as well - or perhaps even my daughter; we were, and always have been, very close and really good friends.

Laura is a stunning redhead with an amazing body; she is slim and very fit. She's a fitness fanatic who visits the gym three or four times a week, and goes jogging most days. She has the most amazing, perfect legs, and a great pair of firm tits that most women would die for.

It was never Laura's intention to stay with us for more than a few weeks, but six months down the line she still lives with us. We have no intention of asking her to move out, as we have a large house, and we still have our own private time even with her in the home.

Laura works for a large firm of solicitors, and always looks amazing when she leaves the house in the morning. She wears business suits and heels, and the sight of her always makes my cock twitch. The length of her skirt varies, and knowing she is wearing black-seamed stockings beneath, and most probably a tiny thong, makes my heart pound and my cock twitch. I know this because I help with all the laundry in the house, and have had the chance to see all of her amazing lingerie.

Over the Christmas period my wife and I still had to work either side of the holidays, but Laura had a long break between Christmas and New Year. Tricia and I work opposite times; she works days and I nights, so when she is getting up and going to work, I am showering and getting into bed.

Well, it was then that this story begins. I was lying naked in my bed, having just showered and dried off, and was settling down for a few hours sleep. My wife had left for work and would not be home for at least nine hours, when I felt someone slip into our bed on Tricia’s side. I then felt the unmistakable feeling of a silk-stockinged leg running up my leg and playing footsie with me!

My first though was that Tricia had taken an extra day off and wanted to surprise me. I just lay there and enjoyed the attention. Next, a hand slipped around to my now semi-erect cock and began slowly rubbing it up and down. I was still slightly dozing, as I had only just fallen into a deep sleep, but slowly turned over onto my back and looked straight into the eyes of... Tricia? No, it was not Tricia; it was Laura!

"Whoa!" I said. I sat bolt upright and pulled back, taking the quilt with me, leaving Laura lying on the mattress dressed in a black and red basque, a tiny red thong, and silky black stockings. She looked amazing! I questioned her as to what she was doing; she replied that she knew I wanted her from the way I looked at her, and this was her way of saying 'Thank you' for everything - and that anyway, it was Christmas.

As I sat there looking down at Laura, I realized she still had my cock in her hand! I was enjoying the attention - and the fact that Laura, who is sixteen years my junior, wanted me!

Laura sat up beside me and pulled my face to hers and started kissing me; at first just small pecks, then, as she became more confident, slipping her tongue into my mouth and allowing our tongues to dance together. I was now feeling a bit braver myself, and slipped a hand onto one of her wonderful, large breasts. I started to caress her nipples through her basque. She was obviously enjoying the attention herself, judging from the tiny 'ahhs' she let out.

We continued the heavy petting as she helped me remove her basque, leaving her topless, allowing me to see those huge breasts for the very first time.

Her nipples were very pale and pink, but very big and stubby, and incredibly hard and erect. I took no time at all in dropping my head and popping each nipple into my mouth, and I sucked on her wonderful breasts as she continued to rub and caress my cock and big shaved balls.

After what seemed like forever, she pushed me back onto my pillow. She then positioned herself between my legs and took my very hard, erect cock in her mouth, and gave me an incredible blow job. She bobbed up and down for ages, occasionally stopping to suck and bite my balls and slip a finger into my anus as she did; this was quickly getting me to the point of no return.

I warned her that I was getting close to coming, but she just smiled and winked at me. She carried on, sucking on my cock, rubbing it with one hand and fingering my anus with the other. In no time I shot my load into her mouth, one hot shot after another until I could come no more. She continued until she had sucked me dry; soon, I was getting too sensitive for her to go on, and had to ask her to stop.

She sat up, still looking amazing, and licked her lips as she said, "Right, your turn!" She pulled off her thong and lay on Tricia’s side of the bed, spreading her stocking-clad legs. She took my hand and positioned me between her legs, pushing my head down into her soaking wet pussy, and said, "Right, now I want the same, please."

Before I started I grabbed some lube from my drawer and squeezed some onto my fingers, and then as I lowered my head into her pussy I slipped two fingers into her tight little anus. I was eating her pussy like the expert I am, while at the same time bringing her to an orgasm by fingering her sweet little anus. She was loving every minute of it, telling me to never stop; both her pussy and my face were soaking wet as I sucked on her pussy juices.

I then took her legs and placed them on my shoulders; I removed my fingers from her anus and replaced them with my tongue, giving her a new sensation - something she had never experienced before. Laura was moaning and having multiple orgasms as I continued to tongue her ass and thrust three fingers into her sopping pussy.

My cock was now back up to a full erection, so I grabbed the lube and squeezed a big load onto my cock, rubbing it over the end. I looked at Laura, giving her a smile and a wink; she said, "You’re not going to shove that thing up my arse! It’s too big.” I asked if she had tried anal before, and she said that she had not.

I butted my cock up against her tight - but now very wet - anus, squeezed some more lube onto her tight hole, and spread it around, slipping a couple of fingers deep inside of her. Then, slowly and gently, I slipped my cock into her very tight anus inch by inch until all eight inches were buried deep inside of her. Laura moaned, and looked to be in some pain, but she just asked me to be gentle as I slowly fucked her ass, gradually building up the speed. Laura had so many orgasms I lost count; I alternated between her anus and her pussy, giving her a real good pounding. Laura than asked - no, demanded - that I shoot my load into her asshole! This I did, gladly.

After emptying my load, I pulled out of her ass and lay on the bed beside Laura. To my surprise, she took my cock into her mouth without wiping her juices and my come off of it, and cleaned me up! We lay in each other’s arms and kissed, long and deep, before we both showered. After we'd dressed we sat and had coffee together. We discussed what had happened, and promised to do it again as long as it did not affect my relationship with Tricia.

I had clearly forgotten myself, and had just let the excitement of the occasion take over. At the time I'd felt no guilt... unlike now; still, we have had many sessions like the one described.