For a couple of years I shared a room with my Grandad. The house was small and I was put up in a tiny loft room but big enough for two small beds .And the great thing about it it was so private from the rest of the house I've always liked him . He did manual farm / labouring all his life and he was built wiry sinewy muscle and a nice thick moustache . I never thought about him but one night when he undressed as I pretended to be asleep I opened my eyes and saw him naked, and when I saw that heavy cock swinging surrounded by thick bushy hair I thought I was going to cum in my bed ! All night I couldn't think of anything but him . After that I needed to get physicslly closer to him . And I wasnt surprised that he was up for it as well . Started at nights in bed talking about personal stuff and obviously sex and swapping stories and that got us horny . I heard him a few times mastubate at night , and I started to as well and after a while we masturbated in our beds and could hear each other groaning and panting . We started with some play wrestling and at times as it went on it got more intense . We started with nothing very explicit but some hot scissors and 69 positions that got me close to that cock. But one night the fooling around became so horny and intense we both knew as we rolled around on the bed something was going happen. As we pretended to wrestle his cock became so hard and just jutted out of his long John's and couldnt stop myself and just open my mouth and try to swallow as much of that cock as I could . We were so horny and raging as i suck on the bell end I just felt the warm spunk in my mouth . Honestly it was so quick we both didnt have to think. I swallowed his cum and we both looked at each other smiled , said nothing and went to bed.