Let me explain the situation. I'm 53 my wife is 35, we own a very successful business which takes me away quite a lot. My wife 'Emma' is stunning. I know I'm biased but she has an amazing figure, nice firm tits and model looks and she goes crazy if she doesn't get sex at least 5 times a week. As you can imagine, with me going away I worry that she may get too frustrated and stray but as far as I can tell she hasn't and is happy to use the toys I buy for her. Anyway back to why I'm writing. We have often discussed sharing, threesomes and stuff in order to spice things up which is why we read the stories on this site and maybe we will even join and start meeting people. Emma regularly teased me about my secretary Alison, she's 23, blond, fantastic shape quite pretty and has suggested on more than one occasion that I 'test the waters' to see if I could get her into bed as an introduction to our swinging lifestyle. Personally I was against this becouse she is quite timid and I didn't want to make her feel awkward but Amanda had different ideas and invited Alison on a girls night out and suggested she stays the weekend. The weekend came and the girls went out coming back in the early hours extremely drunk, in fact not getting up until well after midday. Now, we have quite a nice house with a gym, sauna and jacuzzi (the pool may come later). Later that evening Emma decides, after a bottle of wine or two, that it would be fun to all jump in the jacuzzi which we did. Emma and Alison are getting on very well when Emma decides to play truth or dare and whoever failed had to take some clothes off. As we where only wearing swim suits etc is was obvious what she was up too. Within a few minutes both Emma and Alison where naked, Emma pulls my shorts off in a fit of giggles whilst pretending to be shocked at the size of my cock and the fact I had a hard on (well you can't blame me!) Although I had seen Alison's cleavage in work this was the first time I had seen her tits. Her nipples are huge round and dark red and her tits where smaller than I had expected but so firm they hardly dropped at all. The two girls shared whispers with Emma getting very suggestive. Alison kept looking at my cock whilst Emma tried to convince her to take hold of it which they both thought was hilarious. In the end Emma said to Alison 'wouldn't you like to get that fucking thing inside you? It went quite and I thought that maybe Emma had gone too far but Alison looked Emma and said ' should I? Emma moved to the other side so I was in the middle of them, took Alison by the hand and pulled her over telling me to lift her up. I put my hand son Alison's waist and lowered her down, Emma guiding my cock into her pussy. I was surprised at how tight she was in fact it took a couple of attempts before I was fully inside her. Alison let out a squeal and within seconds was riding me quite hard, I had to hold her waist to slow her down. Emma stood in from of her and for the first time since I had known her we where having our threesome. Emma placing her tits in Alison's mouth whilst she played with her tits. Alison riding my my cock so hard it was going as deep as it could into her tight pussy. In the end to was all a bit much for me, I took hold of Alison, lifted her up with my cock still inside her and lay her face down at the side of the jacuzzi and fucked her doggy style. The water was splashing all over the place and Alison was squealing and shaking and to be honest I pumped so much cum into her bits where floating in the water. I sat back down not believing what had just happened, Emma's face was a picture, it was as though she had been told something shocking. She looked at me with a big grin and told me to 'get out its my turn now'. Not sure what she meant I assumes she wanted me to fuck her but she pushed me out of the jacuzzi, went over to Alison who was still on her stomach out of breath, pulled her back into the water. As I was putting a towel round me I looked back and Emma had sat Alison on her lap and was sucking her breasts and the way they where moving it was obvious they where grinding pussies. I had a quick shower and came back expecting the girls to be out and dressed hoping it would't feel awkward but as I walked into the room they where bot having the loudest orgasm ever so much so I hoped the neighbours wouldn't' hear. I went to make something to eat and they just sat and talked as though nothing had happened. Needless to say Alison has stayed the weekend a few times and we have both fucked her, either in bed, the jacuzzi, sauna, living room. I even had her against the wall which didn't' do the wall in the office which didn't' do the wall paper any good but that's another story.