It was a really hot summer's day and we were walking a remote track across fields to a small lake to bathe. As it was hot we had lots of water - and a couple of beers before we set out. About half way to the lake I began to feel uncomfortable and ahcing to pee. It was made worse by having a full bum - oh why hadn't I gone before I came out. I explaiend to Sally that I had to answer the call of nature and she walked on whilst I undid my belt and slid my zip hurriedly down, concious of drops of piss leaking from my bursting bladder and dampening my pants. With my pants round my ankles I was concentrating so hard not to get pee or shit on my pants that I didn't notice Sally had double back behind me but the cracking of a stick as she moved suddenly told me where she was. There was nothing I could do. My bum hole was already relaxed and a large firm crap was pushing out. As the pressure behind eased my piss burst out and careful though I was splashed all over my pants. I swore softly as I pulled my clothes on again but tinkling laughter from sally surprised me. She skipped across and her hand gently rubbed the dark wet stain. My embarrassment was only momentary as I spotted a spreading damp patch on her jeans but I was taken by surprise when she pushed my hand between her thighs so that I could feel the hot golden juice running through the material. We walked on and had a wonderful swim to cool off. The following afternoon Sally was face down lying on the bed taking a siesta. I thought I should teach her a lesson for being such a peeping tom. I unwrapped her sarong to expose her pink slim buttocks and carefully positioned myself astride her and began masturbating. Now I decided to make her wet and surprise her and to do this I had to push really hard. Before I could stop it I felt my bum opening again and a firm offering began to push its way out. I immediately sat down which pushed it back in but awoke Sally. She sleepily giggled and then squealed as she felt drops splashing from my prick over her back. She was certainly aroused and her hand wriggled beneath her hips to make an exploration of her soft, fine golden thatch. She begged for more piss and anxious to oblige I squeezed. A fine spray spattered over her beautiful sun-tanned back with drops flying all about as I wanked harder. More, she cried and I squeezed really hard this time. She was rewarded by a stream of piss and her hand wriggled more furiously beneath her hips. However I could no longer hold the firm crap in and it slid from between my cheeks to nestle hotly between hers. She gave a great shuddering cry which I thought showed her fury and disgust but instead it was the beginnings of wave after wave of orgasm and clearly thrilled her beyond all expectation. After hers spasms subsided she said, now its your turn. She put her hand in her crack and held my splendid offering in its new home. She made me climb off her and lay doan on my back. She climbed across and settled down for action sliding her hand away to allow the crap to return to its owner. She was squatting with her golden bush soft and sticky from her cum after cum and her wanking hand held her lips apart to allow a sharp stream of piss to play over my bell and chest. She thrust her hips forward and made the stream play over my nipples and splash over my face. I opened my mouth and delighted her by catching drops in my mouth and savouring every one of them. By now she was low on piss and she too had to push hard - or maybe she was just returning the compliment. I felt her cheeks separate and a hot and softish shit push out and over my balls. I felt it squeeze betwen my thighs where it would meet my own which had been resting there since Sally kindly returned it. For such a slim and refined young lady she managed to store an astonishing amount of piss and crap for my legs and ball and now my cock were generously coated. With a final push she washed me cock end as I my furious beating was rewarded by a screamingly spectacular cum. Seeing - and hearing - me cum made sally jerk at her own cunt with only a few more strokes before she too shuudered and came again. She fell exhausted on top of me and we shared all our juices and the terrible mess before showering each other for ages to restore our fragrant selves - and to prepare for another dreamy fuck.