I have been seeing Paul on and off for a couple of years, sex was ok but not great, anyway last Saturday afternoon I was out in the town and thought to drop in and see him at his house. When I arrived I walked around the back and in through the unlocked back door. I could hear some noises from the living room and thought it was the TV. I opened the door and to my shock and surprise there was Paul lying on the floor legs over some blokes shoulders getting his arse pumped by a big cock. I had absolutely no clue that he was a sausage jockey at all. I stood still and watched while putting my hand into my knickers to rub my clit. I was so turned on but very surprised, I crept across the carpet and squatted down at the the side of them. They looked shocked and I'm sure their hard cocks subsided. I whispered it's lovely please carry on. And they did. Paul wanking himself as Charles (I later found out his name) pushed his big cock back into Pauls bottom. I never knew that I would like and react in this way. After a few minutes they stopped and Paul got on his knees taking Charles cock in his mouth and sucking away like he was hungry. I was wanking myself off having come almost immediately. Charles shot his spunk all over Pauls face and I was invited to lick it off which I did. I can't wait for next Saturday as apparently this is a regular thing and I'm invited to join them now and again. Paul told me later that night that he has been riding cock as he put it and sucking since he was in his early 20s . He loves women but men too and who can blame him it's the best of both worlds. He has promised to take me to a local woods once the weather gets better where he goes to suck men off, hopefully we will find some who will take us on as a couple I love the thought of sucking strangers while Paul is next to me doing the same...