Read part 1 first.

The thought that kept popping into my head while I was pushing my cock in and out her Was of Mark. I didn't understand why I was having this thought but it was stuck in my mind. The thought of my girlfriend underneath my best friend, her legs wrapped round him, his bigger cock reaching deeper than I ever could. This was the girl I loved, the one girl Mark couldn't have. I was giving her to him in my imagination. That was the first night I cum to the thought of Emma being fucked. Once we cleaned our selves up we got in bed and cuddled. For the next hour we continued to listen to Mark fucking. My cock was rock hard again I was imagining it was Emma that was next door and I was just listening In. I looked at Emma she was pretending to be asleep. Her breathing was really heavy there was noway she could sleep through this. I could of just fucked her again I was really hard but for some reason I didn't.

Nothing happend for awhile I carried on loving Emma falling deeper and deeper in love. We moved in together and went on holidays. Our sex life was still really good, fucking like rabbits at every opportunity. The thoughts I had of Emma and Mark had vanished. This all changed one night abroad, We were both really drunk. I was fucking Emma in a hotel room. I had her on her back missionary, My head was next hers on the bed. She turned her head and whispered in my ear, "fuck me harder Mark". The thoughts of the two of them together came flooding back. I didn't cum straight away, I was very close. I whispered back "you want it Emma, Jack will never know" It was as if we had played out this fantasy before. The sex was by far the best I had ever had we both climaxed several times that night.

So as you can imagine, this role play fantasy, pretending I was Mark while fucking Emma continued. I was kind of upset if we didn't do it when we fucked. The dirty talk got really out of hand. Emma would say stuff like, "fuck me Mark, fuck me harder than Jack" I would return it by saying "I've always wanted to fuck you Emma, Jack won't find out" The best was when she climaxed I would ask her to shout his name as she cum. I also did this trick where If she hadn't said his name I would fuck her really slowly, pushing my cock halfway into her and then pulling it back out. She would start to get frustrated. I then whispered in her ear to say his name. She would eventually give in and I would slam the full length into her and quicken the pace I then slowed down until she repeated his name. Her trick was to tell me she had already fucked him and was cheating on me. I'd cum very hard after I would always ask her if she was telling the truth. She would laugh and say "its just our fantasy game"!

We continued to see Mark, we would still go out occasionally and would stay at his house. Emma did become a little bit flirty with Mark but it wasn't to noticeable and Mark didn't seem to catch on. We still both listened to Mark fucking and our games became a bit dirtier. I would ask Emma to go join them, to say I was asleep. she even got to his door one night I actually thought it was going to happen that I'd gone to far. She chickened out and we fucked again.

One night Emma was going out with friends I stayed at home watching the football. It got to 11 o'clock I received a text from Emma. I opened the message and it was a picture message of Emma and Mark. Someone had taken the photo for them they were just standing together Mark had his arm round her. It looked like an innocent enough photo. My cock had different ideas though. The caption said" look who I've run into, the girls have gone home now. Is it okay if I stay out with Mark"? I could of said no come home. I replied "yes thats fine have fun"

Now I'm not a raging cuckold or pervert at this point in the story. I did however go straight to the bedroom and masturbate. As soon as I cum reality hit me. I didn't want Emma the girl I'd fallen in love with. The one girl Mark couldn't have. The girl I wanted to spend the rest of my life with fucking my best friend. I texted Emma again and told her to get a taxi back, that I would pay for it. She texted back with unhappy face "okay". I must of drifted off because I was woken up at 4 o'clock in the morning by Emma getting into bed. I asked her where she'd been till this time. She was very drunk she mumbled a name of one of the night clubs. The night Club does close at 3 and then the taxi ride back would make sense. I drifted back off to sleep to tired to ask more questions.

Life carried on we loved each other we partied, we fucked and we played our fantasy game. One night playing our game both drunk. Emma was doing her trick and telling me a story of her fucking Mark. This time though she was describing the night she went out with the girls and met Mark. She told me how they found them selves alone together in a club. They were dancing together and Mark was squeezing her arse and pulling her body close to his. She described how she could feel his stiff cock in his jeans. His hands then found there way up her dress and she felt his fingers rubbing on her knickers. She told me before she new it they were kissing. I kept asking her to tell me more. I was slowly making love to her listening to every detail. She told me they left the club and went back to Marks house.

She stopped her story telling looked me in my eyes and said "promise you won't be mad, I love you" My dick was pulsing inside her pussy. I didn't know if this was fantasy or real. This was the best one she had told so far. I asked her to carry on, I begged her to tell me more. Once they were in his room Mark pulled her dress over her head she was standing infront of him in her bra and thong. He removed his jeans and top and then placed her hands on his boxers. she pulled them down slowly, releasing his cock. It was huge, just like we thought it would be she whispered. She put his hard cock to her lips and took it in her mouth she told me how it tasted and how it filled her mouth. How she couldn't get it all in and licked up and down his shaft. She told me he then stood up and bent her over the bed. Her legs still on the floor. He pulled one of her arms behind her back holding her in place. He then pushed his cock in her she felt his full length on the first thrust. He fucked her at a fast pace slamming his cock into her. He let go of her hand and grabbed her hair pulling it back so she was looking forward. She described how he fucked her all over his room making her scream like all the girls before. I climaxed and fell onto of Emma. I looked her in her eyes and asked "was that true"

Part 3 possibly tbc