It came as no surprise to me when I first discovered my girlfriend Amanda had been seeing another guy behind my back. We'd rarely been having sex of late and I could tell my girlfriend was getting frustrated with me with my lack of interest in sex. Although she claimed nothing sexual had happened between this guy, it was merely just a few kisses and a bit of fondling. He was a nearby neighbour whom she had been getting to know. One day after Amanda finished work she bumped into Tom and had invited her over to his place to chill. Rather than getting upset about this I found myself getting turned on knowing my girlfriend had been up to no good and if I couldn't satisfy her properly may someone else should. After a few days thinking a few things over, I decided I was happy to let my girlfriend continue to see this guy and fuck him on the condition she told me when and where she saw him. Her face lit up when I told her the news and she asked me if she was allowed to see other guys too. I told her she could see who she likes as long as I knew about it. She looked quite ecstatic as she told me there was an old friend of hers called Peter she also desperately wanted to fuck. I said I was fine about that too as long as I knew what was going on behind the closed doors. A couple of days later my girlfriend told me she had been in touch with Peter and had invited him over to her place for the day on Saturday. I told her I hoped she has a good time with him and that he does a good job of satisfying in bed and that I would be over later that evening so she could tell me all about it. When I arrived at my girlfriends place on the Saturday evening, she opened her door with a big smirk on her face. She also looked pretty exhausted as she told me how Peter had fucked her silly four times that day. Apparently Peter had put her in all different types of positions- missionary, scissors, her on top and doggy and fucked the shit out of her all day until she couldn't take no more. She said she really enjoyed her sex session with Peter and she asked him if this can become a regular meet ups with him every week. I was happy myself also knowing my girl was now going to get her sexual needs met elsewhere. Next up my girlfriend planned to meet her neighbour, Tom for a sex session the following week at his flat 5 mins away. She told me all about what went on the following morning and how he had fucked her twice that night and now she was looking so forward to fucking Peter again at the weekend. She seemed so happy now that she was now getting fucked by two cocks on a regular basis. The following weekend things started hotting up even more. My girlfriend had another sex marathon with Peter the following Saturday daytime before I met her later that evening to hear more tales of her amazing new sex life. I ended up fucking my girlfriend later that night taking her tally to four fucks that day. The following morning, Tom was texting her while we were still in bed, asking if she was up for a fuck. I told Amanda she had only one hour to go for a quickie as I wanted to fuck her later on. She disappeared for an hour to get her 5th fuck and 3rd cock within 24 hours. As I’m all alone in her flat I’m fantasising about what filthy stuff she is getting up to with him. She returned just over an hour later looking worse for wear and need of a rest after telling me Tom banged her silly over his bed. This is now becoming a regular routine for my girlfriend and it has also improved our own sex life no end. She has picked up a lot of new tips from fucking the other guys and is also now a lot more confident in the bedroom and more comfortable having sex in new positions with me. We are now talking over the possibility of finding another fuck buddy for her taking her total to 3. To be continued....