Well it was not a surprise to walk in this afternoon from work to find sally working herself on a rock hard cock but was surprised to see who's cock it was. Today sally has been a naughty Slut as I walked in on her sliding herself down on one of my friends large cock. Gareth has been a friend of ours for many years. His wife is a real knock out and loves a flirt but nothing has ever happened much to my disappointment. Gareth has never hidden the fact that he fancies sally. Often flirting with her and teasing her by telling her that she wouldn't be able to handle what he has in his pants and my god he wasn't kidding. As I walked in they were just changing positions and I got to see Gareth's cock in all its glory. At least 10 inches and as thick as a can of red bull. They stopped as they noticed me but I just smiled and told them to carry on as I made myself comfy stripping naked and sitting in a chair. I watched for over an hour as sally and Gareth fucked like animals. Sally screaming his name as he ploughed his impressive length deep inside her Slut hole. All of a sudden I froze as sally is not on birth control as we are trying for a baby and there was Gareth sliding his gift from god inside Sally's willing pussy bare back. I told them that Gareth needs to pull out before he loses his load but sally begged me to let him unload inside her as she was loving his cock. So reluctantly I agreed and watched as she begged and begged Gareth for his fertile cum and he duly obliged giving Sally's belly a bucket load of cum. As he started to unload sally screamed out "that's it baby give me all of your seed", "make dan watch as you seed my pussy". I lost control and shot my load all over the floor as I watched sally become the dirty slut that I know she is. When Gareth left I cleaned sally up with my tongue making me hard again and I slid in with ease as her pussy was stretched and unloaded inside sally. We talked after and she confessed that her and Gareth had been fucking for a while and she doesn't intend to stop which I have agreed to. I asked her why and she admitted that Gareth's big cock goes places no other cock has gone before and she loves the idea of him seeding her. Our message box is ready as we are looking for other guys who would like to do the same aswell as having a hot female joining us or as sally has said a female to enjoy herself with me