Shelly and I started dating when she had just finished college, I was 25 and she was 22, I met her through a good friend of mine who had dated her for a few months, but they were more friends than anything. We hit it off right away and although it was weird at first, my buddy Jon was totally cool about it. Our sex life was amazing, she absolutely loved to fuck, and loved giving blowjobs, she was excellent at them and always swallowed. It never dawned on me that she was so good at it because she had lots of practice. I started fantasizing about her with other guys, and she would always jerk me off and tell me dirty stories, fake ones, about what she wanted to do and have done to her. Her imagination was as wild as mine. The thing is my thoughts always came back to her fucking Jon, eventually I told her this, and she seemed hesitant but would tell me tidbits about their sex life. She confessed she didn't really like having sex with him because his cock was too big. I know he was pretty hung, and I know she has trouble even with my cock at barely 6" but still I was so turned on listening to her. She did love playing with his cock, and had more fun grinding her pussy on it and making them both cum that way. Sex was ok, and she would orgasm every so often, but it wasn't as fun as she wanted it.
This went on for a while and I finally asked her if she would be interested in ever fucking him again, to which she confessed she would love to at least suck his cock and grind against him as she always loved his size for that and could cum easily. However it was just pillow talk she said, and wasn't going to go down that road, it was over between them. Disappointing, I set a plan in motion after some online reading, and skeptical i went ahead with the plan. Whenever we played, I made sure to have less and less sex, more attention on her, a lot of using toys to get her off and would make her tell me about how she wanted to fuck others, and deny her orgasms till she was spewing out every deep confession and fantasy she had. She would cum the hardest and fastest whenever Jon was brought up.
Finally after months of planting the seed, she agreed maybe we could try it with him, if he was down for it. Jon of course agreed, but said it would be weird with me in the room, so maybe the first time I would wait in the living room or something while they played. We agreed on a Friday night, some drinking to loosen us up. I didn't know how it was going to happen, but essentially we were all sitting on the couch, and her in the middle, he began to kiss her, grab her tits, and I could tell she was really into it, and I was rock hard watching them make out. They got up and he said he really appreciates this, and to stay here on the couch she was in for a long night.