As we were nearing the park I ribbed my brother, asking him if he was going to the toilets to let men get at him, he went very red and told me it was getting too crowded and dangerous to hang around there too often. I laughed and asked how he managed now then and still crimson he said that the park-keepers shed had some loose boards at the back and on Sundays he sometimes went there with the big fat man or somebody else. I could see he was getting all hot and bothered so I giggled and told him I would go and play on the swings for half an hour and he could go off on his own. He was very relived and still with a guilty look on his face wandered off, I knowing that I was going to follow him to see where he went. He must have been really ready as he never looked back once as he went through a gap in the tall hedge and I gave him a few minutes and then followed. It was a fairly large shed and there were machines parked round it and I picked my way round them and went to the back, hoping there would be a window and when I spotted one was disappointed that it was so dirty there was no chance of my seeing what was going on inside.

Downcast I was about to go when I realised that there was lots of holes in the planks where knots had fallen out and looked through some of them until I found one that had been made bigger for some reason. I soon realised why when I could see my brother, laid back along a bench, trousers round his ankles and a man who imagined to be the fat friend at him. Mercy me!!!!!! I was shocked to see that the man was sucking on his cock, bobbing his head up and down so that he was not wanking him with his hand and he was handling his ball sack as well as roaming all over his exposed body. I was excited by both the sight and the sounds as my brother moaned and groaned with pleasure and I too was starting to tingle, hurriedly taking my panties off and for the first time in my life played with my own slit and hole as I watched. Now I knew I would not like to have a man in my mouth but it was obvious both my brother and fat man were enjoying what was happening as my brothers moans and gasps were getting louder and louder. I was working my own fingers furiously as my brother squealed and bucked on the bench and the mans head was going fourteen to the dozen as he brought him to his peak and when he let go of him there was no sign of any cream so I knew it had been swallowed.

A hand grasped my shoulder and I was so frightened I feinted, coming round after I don’t know how long. My dress was round my neck and a man stood over me having a good look at what was on view. He smiled in a very friendly way and asked if I was alright and helped me to my feet, telling me I had better have a sit down so we should go into the shed. I was protesting as he lead me past an old grass cutting machine and when he removed a loose panel of planks was sobbing with fright and quickly played my last ace by telling him that my brother would be mad to know I had been spying on him. He laughed loudly and the two inside realised that we were entering, my brother looking embarrassed and the fat man beamed as the man pulled my dress up as he said he had found a young girl with no knickers on peeking through the spy hole and three males were looking at my naked lower half. Fat man had a wicked look in his face as the man told him I was the boys sister and I was really frightened when he pulled my dress off and apart from my shoes and socks I stood naked and sobbing as even my brother had a good look at me and his penis started to rise.

Fat man led him to the bench and made him lay on it, drawing his skin back, and as the other man stood me beside him we watched as he hardened and wriggled then I was told to take over and show them how I did it. I wanked him slowly, still sobbing on and off with continued worry and the new man stood behind me and reached round to my crack and ran a finger up and down it, the first man to handle me far a day or two and I relaxed then and at last started to think I might see some fun.