when I was about 11 years old my mums brother came to stay with us,he was about 40 and divorced.My mum and dad didn't get on too well and were always arguing but mum and uncle Pete got on very well and would sit together laughing when dad was out of the house,they were more like girlfriend and boy friend than brother and sister.One evening when dad was out of town on business I woke up it was about 11.pm and my little cock was as stiff as a board I began playing with it and the feeling was like nothing else I had experienced before I was really getting in to it when I heard mum and uncle Pete coming up the stairs,I expected them to go to their own bedrooms but instead heard mum say be quiet David is asleep,then I heard mum's bedroom door open and whispering and muffled laughing.I crept from my bed my cock was now soft and being a nosy 11 year old I waited a few minutes then quietly tiptoed to my door and slowly opened it and crept along the hallway towards mum's bedroom,the door was ajar and her side light was on,I peeped through the crack in the door and will never forget the sight I saw Uncle Pete was on the bed with mum they were kissing and his hand was up mum's dress between her legs,I was mesmerized as I watched and felt my cock getting stiff again as mum lifted her bottom and uncle Pete pulled her knickers down,I could see mum's hairy fanny and as she opened her legs wider her pink pussy lips,then uncle Pete undid his trousers exposing a cock that to me looked enormous with a shiny purple head,he kicked them off and got on top of mum and I stared as his bottom began to rise and fall as he began to fuck her.I looked at mum's face her eyes were shut as bottom pushed faster and faster it was then I had my first ever orgasm thick blobs of spunk landed on the carpet,they were still fucking as I crept back to my room with my head spinning.I lay awake for hours that night with everything I had witnessed going round and round in my head.The following morning as soon as I woke my thoughts went bac to last nights experience and I felt a mixture of lust and revulsion,knowing my mum was cheating on my dad with her own brother,fortunately lust took over and I had the second wank of my life.Uncle Pete moved to his own place eventually and I have never mentioned what I saw that night to anyone,but has provided me with hundreds of great wanks over the years.