Peering through the blinds of our kitchen fifteen years ago I saw my mom and dad having sex. Not remakable you may think. The thing is they weren't alone. As my father was filling my naked moms mouth with his cock, his younger brother, my uncle, was fucking my moms asshole. I shouldn't have been there as I was supposed to visiting my grandparents. But boys being boys, I'd secretly spent my bus fare my dad had given me the night before to visit them, on my favourite comic book magazine. I stood watching my parents and uncle fuck one another for the next twenty or so minutes, until both men had cum inside my moms ass.
I didn't say anything back then. And I've never mentioned it since. The reason i'm confessing is my uncle will be staying over at my parents home over the Christmas period, and my mom has also asked me and my fiancee if we'll join them for a few nights. Boy, I hope they all don't still fuck together.