My birthday party; a barbecue; a sunny afternoon fading into a very pleasant evening. I was on duty at the grill and a group arrived with Jo and her man in front. It seems they had just got engaged and were having a celebration when they heard the racket coming from our place, where a local band were starting to 'warmup' ... the noise carried well. She was first up to the grill, showing off her diamond and I congratulated them saying it was a 'good decision'! Now , her guy liked a drink and we had stacks of it in an old tent erected in our top field. At the time we lived on about 5 acres with woodland all around. A small house but extensive outbuildings... very nice all in all. Paul was getting stuck into his favourite beer and was getting loud; he was happy. Jo, on the other hand was a tiny bit miffed that he was concentrating on drinking and not her but I just laughed and told her to relax and enjoy herself. I had stopped cooking and another guest had taken over. I mad my way to the 'beer tent' , grabbed a drink and was crossing back to the house when Jo appeared by my side. Stopping we chatted amicably and she seemed quite merry. I had my hand on her back as we chatted and knew she was wearing no bra; could also make out that she had what appeared to be a tiny pair of knickers on under her shift dress, shoes and that was it. The girl was two stages away from being naked ! I told her that she looked devastatingly sexy and she smiled saying she was glad she had made someone notice. I pulled her closer and said that I could tell her more if she wanted to hear some flattery and she readily agreed. I told her to meet me in 10 minutes at the front of the house under the pretext of showing her the dogs ( if anybody asked.. which they didn't !) In less than 10 minutes , there she was waiting for me. She said with a roguish smile " go on then flatter me !" Leaning in , I told her that I wanted to make her cum. I wanted to watch her eyes as she orgasmed. I wanted to be deep inside her spilling my hot semen and filling her full. In short I wanted to fuck her. The last two sentences wiped the smile away and it was replaced by an 'are you serious?' look. In answer to her look , I took her hand and drew her away to a fairly private area down a wooded bank, although it was next to the public footpath at the side of our property. Gently pushing her back against a big chestnut tree, I kissed her.. hard. Pulling my head back I told her to take off her knickers and she did so without any further ado. I pocketed them. I crouched down in front of her lifted her hem and started to lick her salty little pussy, not shaved but neatly trimmed. She gasped and started to enjoy; I got her thighs one on either of my shoulders with her back still against the tree, stood up taking her well up there with her pussy right at my mouth and the rest of her body above me , her hands on top of my head as I continued to eat her out. She was making a lot of noise and this must have been what attracted Frank, another of the guests, because he appeared on the footpath and when we noticed him said " don't stop on account of me !" Jo came noisily and crouching back down she slid down the tree , the bark taking her dress up to her neck exposing her small breasts with those diamond hard nipples she has. Getting her stood up I lifted it clear of her body and there she was naked except for shoes. I pushed her gently forwards bending her at the hips and moved behind her, slipping my erection deep into her very wet lips and pussy. With my thrusts she kept falling forwards and Frank just stepped up to help her from falling. She had a grip of his belt at either side of him and was concentrating on the sound fucking she was receiving from me. Frank, on the other hand managed to get his cock out and there she was with another hard-on waving in her face. Come on Jo , I grunted take it in your mouth and she did it, being fucked at either end ; a nice spit roasting. I came and so did Frank. I think Jo had orgasmed again but to be honest was only thinking of my own at that time. By the time I withdrew I had well and truly filled her full of my spunk... it was seeping out and she had more than a mouthful from Frank, who zipped up smiled at us both and went back to the party. I used her knickers to carefully wipe her clean and threw them away, then got her dressed again; didn't take long, just dropped her dress over her head and shoulders, smoothed her down and took her by the hand back to the party. She was flushed when she rejoined her man in the beer tent and we caught ourselves grinning knowingly at each other for the rest of the evening. I am sure Paul wondered what the fuck was going on but Frank kept quiet and neither myself or Jo let slip anything from our adventure. The next day, one of my dogs was tearing around with something and my missus took it from him, opening it out to a very small pair of knickers, which my wife held up and laughed at the thought that " some of our guests had had more fun than others!" . Me, I smiled and laughed too !